Replace kEmptyString with OnceInit initialized string*

This removes the global constructor call for std::string kEmptyString.

This is roughly an application of b/7549760 from the internal
version of protobuf.

Upstream patch here https://codereview.appspot.com/63480043/.

R=fischman@chromium.org
TBR=darin@chromium.org
BUG=341941,94925

Review URL: https://codereview.chromium.org/164743002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@251212 0039d316-1c4b-4281-b951-d872f2087c98

10 files changed, 364 insertions, 351 deletions

diff --git a/third_party/protobuf/src/google/protobuf/compiler/cpp/cpp_string_field.cc b/third_party/protobuf/src/google/protobuf/compiler/cpp/cpp_string_field.cc
index 9c0911a..0b58b98 100644
--- a/third_party/protobuf/src/google/protobuf/compiler/cpp/cpp_string_field.cc
+++ b/third_party/protobuf/src/google/protobuf/compiler/cpp/cpp_string_field.cc
@@ -53,7 +53,7 @@ void SetStringVariables(const FieldDescriptor* descriptor,
   (*variables)["default_length"] =
       SimpleItoa(descriptor->default_value_string().length());
   (*variables)["default_variable"] = descriptor->default_value_string().empty()
-      ? "&::google::protobuf::internal::kEmptyString"
+      ? "&::google::protobuf::internal::GetEmptyString()"
       : "_default_" + FieldName(descriptor) + "_";
   (*variables)["pointer_type"] =
       descriptor->type() == FieldDescriptor::TYPE_BYTES ? "void" : "char";
diff --git a/third_party/protobuf/src/google/protobuf/compiler/plugin.pb.cc b/third_party/protobuf/src/google/protobuf/compiler/plugin.pb.cc
index 88559b8..8dcc604 100644
--- a/third_party/protobuf/src/google/protobuf/compiler/plugin.pb.cc
+++ b/third_party/protobuf/src/google/protobuf/compiler/plugin.pb.cc
@@ -184,7 +184,7 @@ CodeGeneratorRequest::CodeGeneratorRequest(const CodeGeneratorRequest& from)
 
 void CodeGeneratorRequest::SharedCtor() {
   _cached_size_ = 0;
-  parameter_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+  parameter_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
   ::memset(_has_bits_, 0, sizeof(_has_bits_));
 }
 
@@ -193,7 +193,7 @@ CodeGeneratorRequest::~CodeGeneratorRequest() {
 }
 
 void CodeGeneratorRequest::SharedDtor() {
-  if (parameter_ != &::google::protobuf::internal::kEmptyString) {
+  if (parameter_ != &::google::protobuf::internal::GetEmptyString()) {
     delete parameter_;
   }
   if (this != default_instance_) {
@@ -224,7 +224,7 @@ CodeGeneratorRequest* CodeGeneratorRequest::New() const {
 void CodeGeneratorRequest::Clear() {
   if (_has_bits_[1 / 32] & (0xffu << (1 % 32))) {
     if (has_parameter()) {
-      if (parameter_ != &::google::protobuf::internal::kEmptyString) {
+      if (parameter_ != &::google::protobuf::internal::GetEmptyString()) {
         parameter_->clear();
       }
     }
@@ -501,9 +501,9 @@ CodeGeneratorResponse_File::CodeGeneratorResponse_File(const CodeGeneratorRespon
 
 void CodeGeneratorResponse_File::SharedCtor() {
   _cached_size_ = 0;
-  name_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
-  insertion_point_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
-  content_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+  name_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
+  insertion_point_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
+  content_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
   ::memset(_has_bits_, 0, sizeof(_has_bits_));
 }
 
@@ -512,13 +512,13 @@ CodeGeneratorResponse_File::~CodeGeneratorResponse_File() {
 }
 
 void CodeGeneratorResponse_File::SharedDtor() {
-  if (name_ != &::google::protobuf::internal::kEmptyString) {
+  if (name_ != &::google::protobuf::internal::GetEmptyString()) {
     delete name_;
   }
-  if (insertion_point_ != &::google::protobuf::internal::kEmptyString) {
+  if (insertion_point_ != &::google::protobuf::internal::GetEmptyString()) {
     delete insertion_point_;
   }
-  if (content_ != &::google::protobuf::internal::kEmptyString) {
+  if (content_ != &::google::protobuf::internal::GetEmptyString()) {
     delete content_;
   }
   if (this != default_instance_) {
@@ -549,17 +549,17 @@ CodeGeneratorResponse_File* CodeGeneratorResponse_File::New() const {
 void CodeGeneratorResponse_File::Clear() {
   if (_has_bits_[0 / 32] & (0xffu << (0 % 32))) {
     if (has_name()) {
-      if (name_ != &::google::protobuf::internal::kEmptyString) {
+      if (name_ != &::google::protobuf::internal::GetEmptyString()) {
         name_->clear();
       }
     }
     if (has_insertion_point()) {
-      if (insertion_point_ != &::google::protobuf::internal::kEmptyString) {
+      if (insertion_point_ != &::google::protobuf::internal::GetEmptyString()) {
         insertion_point_->clear();
       }
     }
     if (has_content()) {
-      if (content_ != &::google::protobuf::internal::kEmptyString) {
+      if (content_ != &::google::protobuf::internal::GetEmptyString()) {
         content_->clear();
       }
     }
@@ -839,7 +839,7 @@ CodeGeneratorResponse::CodeGeneratorResponse(const CodeGeneratorResponse& from)
 
 void CodeGeneratorResponse::SharedCtor() {
   _cached_size_ = 0;
-  error_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+  error_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
   ::memset(_has_bits_, 0, sizeof(_has_bits_));
 }
 
@@ -848,7 +848,7 @@ CodeGeneratorResponse::~CodeGeneratorResponse() {
 }
 
 void CodeGeneratorResponse::SharedDtor() {
-  if (error_ != &::google::protobuf::internal::kEmptyString) {
+  if (error_ != &::google::protobuf::internal::GetEmptyString()) {
     delete error_;
   }
   if (this != default_instance_) {
@@ -879,7 +879,7 @@ CodeGeneratorResponse* CodeGeneratorResponse::New() const {
 void CodeGeneratorResponse::Clear() {
   if (_has_bits_[0 / 32] & (0xffu << (0 % 32))) {
     if (has_error()) {
-      if (error_ != &::google::protobuf::internal::kEmptyString) {
+      if (error_ != &::google::protobuf::internal::GetEmptyString()) {
         error_->clear();
       }
     }
diff --git a/third_party/protobuf/src/google/protobuf/compiler/plugin.pb.h b/third_party/protobuf/src/google/protobuf/compiler/plugin.pb.h
index 68cc21c..6aa1661 100644
--- a/third_party/protobuf/src/google/protobuf/compiler/plugin.pb.h
+++ b/third_party/protobuf/src/google/protobuf/compiler/plugin.pb.h
@@ -438,7 +438,7 @@ inline void CodeGeneratorRequest::clear_has_parameter() {
   _has_bits_[0] &= ~0x00000002u;
 }
 inline void CodeGeneratorRequest::clear_parameter() {
-  if (parameter_ != &::google::protobuf::internal::kEmptyString) {
+  if (parameter_ != &::google::protobuf::internal::GetEmptyString()) {
     parameter_->clear();
   }
   clear_has_parameter();
@@ -448,44 +448,44 @@ inline const ::std::string& CodeGeneratorRequest::parameter() const {
 }
 inline void CodeGeneratorRequest::set_parameter(const ::std::string& value) {
   set_has_parameter();
-  if (parameter_ == &::google::protobuf::internal::kEmptyString) {
+  if (parameter_ == &::google::protobuf::internal::GetEmptyString()) {
     parameter_ = new ::std::string;
   }
   parameter_->assign(value);
 }
 inline void CodeGeneratorRequest::set_parameter(const char* value) {
   set_has_parameter();
-  if (parameter_ == &::google::protobuf::internal::kEmptyString) {
+  if (parameter_ == &::google::protobuf::internal::GetEmptyString()) {
     parameter_ = new ::std::string;
   }
   parameter_->assign(value);
 }
 inline void CodeGeneratorRequest::set_parameter(const char* value, size_t size) {
   set_has_parameter();
-  if (parameter_ == &::google::protobuf::internal::kEmptyString) {
+  if (parameter_ == &::google::protobuf::internal::GetEmptyString()) {
     parameter_ = new ::std::string;
   }
   parameter_->assign(reinterpret_cast<const char*>(value), size);
 }
 inline ::std::string* CodeGeneratorRequest::mutable_parameter() {
   set_has_parameter();
-  if (parameter_ == &::google::protobuf::internal::kEmptyString) {
+  if (parameter_ == &::google::protobuf::internal::GetEmptyString()) {
     parameter_ = new ::std::string;
   }
   return parameter_;
 }
 inline ::std::string* CodeGeneratorRequest::release_parameter() {
   clear_has_parameter();
-  if (parameter_ == &::google::protobuf::internal::kEmptyString) {
+  if (parameter_ == &::google::protobuf::internal::GetEmptyString()) {
     return NULL;
   } else {
     ::std::string* temp = parameter_;
-    parameter_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+    parameter_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
     return temp;
   }
 }
 inline void CodeGeneratorRequest::set_allocated_parameter(::std::string* parameter) {
-  if (parameter_ != &::google::protobuf::internal::kEmptyString) {
+  if (parameter_ != &::google::protobuf::internal::GetEmptyString()) {
     delete parameter_;
   }
   if (parameter) {
@@ -493,7 +493,7 @@ inline void CodeGeneratorRequest::set_allocated_parameter(::std::string* paramet
     parameter_ = parameter;
   } else {
     clear_has_parameter();
-    parameter_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+    parameter_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
   }
 }
 
@@ -537,7 +537,7 @@ inline void CodeGeneratorResponse_File::clear_has_name() {
   _has_bits_[0] &= ~0x00000001u;
 }
 inline void CodeGeneratorResponse_File::clear_name() {
-  if (name_ != &::google::protobuf::internal::kEmptyString) {
+  if (name_ != &::google::protobuf::internal::GetEmptyString()) {
     name_->clear();
   }
   clear_has_name();
@@ -547,44 +547,44 @@ inline const ::std::string& CodeGeneratorResponse_File::name() const {
 }
 inline void CodeGeneratorResponse_File::set_name(const ::std::string& value) {
   set_has_name();
-  if (name_ == &::google::protobuf::internal::kEmptyString) {
+  if (name_ == &::google::protobuf::internal::GetEmptyString()) {
     name_ = new ::std::string;
   }
   name_->assign(value);
 }
 inline void CodeGeneratorResponse_File::set_name(const char* value) {
   set_has_name();
-  if (name_ == &::google::protobuf::internal::kEmptyString) {
+  if (name_ == &::google::protobuf::internal::GetEmptyString()) {
     name_ = new ::std::string;
   }
   name_->assign(value);
 }
 inline void CodeGeneratorResponse_File::set_name(const char* value, size_t size) {
   set_has_name();
-  if (name_ == &::google::protobuf::internal::kEmptyString) {
+  if (name_ == &::google::protobuf::internal::GetEmptyString()) {
     name_ = new ::std::string;
   }
   name_->assign(reinterpret_cast<const char*>(value), size);
 }
 inline ::std::string* CodeGeneratorResponse_File::mutable_name() {
   set_has_name();
-  if (name_ == &::google::protobuf::internal::kEmptyString) {
+  if (name_ == &::google::protobuf::internal::GetEmptyString()) {
     name_ = new ::std::string;
   }
   return name_;
 }
 inline ::std::string* CodeGeneratorResponse_File::release_name() {
   clear_has_name();
-  if (name_ == &::google::protobuf::internal::kEmptyString) {
+  if (name_ == &::google::protobuf::internal::GetEmptyString()) {
     return NULL;
   } else {
     ::std::string* temp = name_;
-    name_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+    name_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
     return temp;
   }
 }
 inline void CodeGeneratorResponse_File::set_allocated_name(::std::string* name) {
-  if (name_ != &::google::protobuf::internal::kEmptyString) {
+  if (name_ != &::google::protobuf::internal::GetEmptyString()) {
     delete name_;
   }
   if (name) {
@@ -592,7 +592,7 @@ inline void CodeGeneratorResponse_File::set_allocated_name(::std::string* name)
     name_ = name;
   } else {
     clear_has_name();
-    name_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+    name_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
   }
 }
 
@@ -607,7 +607,7 @@ inline void CodeGeneratorResponse_File::clear_has_insertion_point() {
   _has_bits_[0] &= ~0x00000002u;
 }
 inline void CodeGeneratorResponse_File::clear_insertion_point() {
-  if (insertion_point_ != &::google::protobuf::internal::kEmptyString) {
+  if (insertion_point_ != &::google::protobuf::internal::GetEmptyString()) {
     insertion_point_->clear();
   }
   clear_has_insertion_point();
@@ -617,44 +617,44 @@ inline const ::std::string& CodeGeneratorResponse_File::insertion_point() const
 }
 inline void CodeGeneratorResponse_File::set_insertion_point(const ::std::string& value) {
   set_has_insertion_point();
-  if (insertion_point_ == &::google::protobuf::internal::kEmptyString) {
+  if (insertion_point_ == &::google::protobuf::internal::GetEmptyString()) {
     insertion_point_ = new ::std::string;
   }
   insertion_point_->assign(value);
 }
 inline void CodeGeneratorResponse_File::set_insertion_point(const char* value) {
   set_has_insertion_point();
-  if (insertion_point_ == &::google::protobuf::internal::kEmptyString) {
+  if (insertion_point_ == &::google::protobuf::internal::GetEmptyString()) {
     insertion_point_ = new ::std::string;
   }
   insertion_point_->assign(value);
 }
 inline void CodeGeneratorResponse_File::set_insertion_point(const char* value, size_t size) {
   set_has_insertion_point();
-  if (insertion_point_ == &::google::protobuf::internal::kEmptyString) {
+  if (insertion_point_ == &::google::protobuf::internal::GetEmptyString()) {
     insertion_point_ = new ::std::string;
   }
   insertion_point_->assign(reinterpret_cast<const char*>(value), size);
 }
 inline ::std::string* CodeGeneratorResponse_File::mutable_insertion_point() {
   set_has_insertion_point();
-  if (insertion_point_ == &::google::protobuf::internal::kEmptyString) {
+  if (insertion_point_ == &::google::protobuf::internal::GetEmptyString()) {
     insertion_point_ = new ::std::string;
   }
   return insertion_point_;
 }
 inline ::std::string* CodeGeneratorResponse_File::release_insertion_point() {
   clear_has_insertion_point();
-  if (insertion_point_ == &::google::protobuf::internal::kEmptyString) {
+  if (insertion_point_ == &::google::protobuf::internal::GetEmptyString()) {
     return NULL;
   } else {
     ::std::string* temp = insertion_point_;
-    insertion_point_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+    insertion_point_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
     return temp;
   }
 }
 inline void CodeGeneratorResponse_File::set_allocated_insertion_point(::std::string* insertion_point) {
-  if (insertion_point_ != &::google::protobuf::internal::kEmptyString) {
+  if (insertion_point_ != &::google::protobuf::internal::GetEmptyString()) {
     delete insertion_point_;
   }
   if (insertion_point) {
@@ -662,7 +662,7 @@ inline void CodeGeneratorResponse_File::set_allocated_insertion_point(::std::str
     insertion_point_ = insertion_point;
   } else {
     clear_has_insertion_point();
-    insertion_point_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+    insertion_point_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
   }
 }
 
@@ -677,7 +677,7 @@ inline void CodeGeneratorResponse_File::clear_has_content() {
   _has_bits_[0] &= ~0x00000004u;
 }
 inline void CodeGeneratorResponse_File::clear_content() {
-  if (content_ != &::google::protobuf::internal::kEmptyString) {
+  if (content_ != &::google::protobuf::internal::GetEmptyString()) {
     content_->clear();
   }
   clear_has_content();
@@ -687,44 +687,44 @@ inline const ::std::string& CodeGeneratorResponse_File::content() const {
 }
 inline void CodeGeneratorResponse_File::set_content(const ::std::string& value) {
   set_has_content();
-  if (content_ == &::google::protobuf::internal::kEmptyString) {
+  if (content_ == &::google::protobuf::internal::GetEmptyString()) {
     content_ = new ::std::string;
   }
   content_->assign(value);
 }
 inline void CodeGeneratorResponse_File::set_content(const char* value) {
   set_has_content();
-  if (content_ == &::google::protobuf::internal::kEmptyString) {
+  if (content_ == &::google::protobuf::internal::GetEmptyString()) {
     content_ = new ::std::string;
   }
   content_->assign(value);
 }
 inline void CodeGeneratorResponse_File::set_content(const char* value, size_t size) {
   set_has_content();
-  if (content_ == &::google::protobuf::internal::kEmptyString) {
+  if (content_ == &::google::protobuf::internal::GetEmptyString()) {
     content_ = new ::std::string;
   }
   content_->assign(reinterpret_cast<const char*>(value), size);
 }
 inline ::std::string* CodeGeneratorResponse_File::mutable_content() {
   set_has_content();
-  if (content_ == &::google::protobuf::internal::kEmptyString) {
+  if (content_ == &::google::protobuf::internal::GetEmptyString()) {
     content_ = new ::std::string;
   }
   return content_;
 }
 inline ::std::string* CodeGeneratorResponse_File::release_content() {
   clear_has_content();
-  if (content_ == &::google::protobuf::internal::kEmptyString) {
+  if (content_ == &::google::protobuf::internal::GetEmptyString()) {
     return NULL;
   } else {
     ::std::string* temp = content_;
-    content_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+    content_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
     return temp;
   }
 }
 inline void CodeGeneratorResponse_File::set_allocated_content(::std::string* content) {
-  if (content_ != &::google::protobuf::internal::kEmptyString) {
+  if (content_ != &::google::protobuf::internal::GetEmptyString()) {
     delete content_;
   }
   if (content) {
@@ -732,7 +732,7 @@ inline void CodeGeneratorResponse_File::set_allocated_content(::std::string* con
     content_ = content;
   } else {
     clear_has_content();
-    content_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+    content_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
   }
 }
 
@@ -751,7 +751,7 @@ inline void CodeGeneratorResponse::clear_has_error() {
   _has_bits_[0] &= ~0x00000001u;
 }
 inline void CodeGeneratorResponse::clear_error() {
-  if (error_ != &::google::protobuf::internal::kEmptyString) {
+  if (error_ != &::google::protobuf::internal::GetEmptyString()) {
     error_->clear();
   }
   clear_has_error();
@@ -761,44 +761,44 @@ inline const ::std::string& CodeGeneratorResponse::error() const {
 }
 inline void CodeGeneratorResponse::set_error(const ::std::string& value) {
   set_has_error();
-  if (error_ == &::google::protobuf::internal::kEmptyString) {
+  if (error_ == &::google::protobuf::internal::GetEmptyString()) {
     error_ = new ::std::string;
   }
   error_->assign(value);
 }
 inline void CodeGeneratorResponse::set_error(const char* value) {
   set_has_error();
-  if (error_ == &::google::protobuf::internal::kEmptyString) {
+  if (error_ == &::google::protobuf::internal::GetEmptyString()) {
     error_ = new ::std::string;
   }
   error_->assign(value);
 }
 inline void CodeGeneratorResponse::set_error(const char* value, size_t size) {
   set_has_error();
-  if (error_ == &::google::protobuf::internal::kEmptyString) {
+  if (error_ == &::google::protobuf::internal::GetEmptyString()) {
     error_ = new ::std::string;
   }
   error_->assign(reinterpret_cast<const char*>(value), size);
 }
 inline ::std::string* CodeGeneratorResponse::mutable_error() {
   set_has_error();
-  if (error_ == &::google::protobuf::internal::kEmptyString) {
+  if (error_ == &::google::protobuf::internal::GetEmptyString()) {
     error_ = new ::std::string;
   }
   return error_;
 }
 inline ::std::string* CodeGeneratorResponse::release_error() {
   clear_has_error();
-  if (error_ == &::google::protobuf::internal::kEmptyString) {
+  if (error_ == &::google::protobuf::internal::GetEmptyString()) {
     return NULL;
   } else {
     ::std::string* temp = error_;
-    error_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+    error_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
     return temp;
   }
 }
 inline void CodeGeneratorResponse::set_allocated_error(::std::string* error) {
-  if (error_ != &::google::protobuf::internal::kEmptyString) {
+  if (error_ != &::google::protobuf::internal::GetEmptyString()) {
     delete error_;
   }
   if (error) {
@@ -806,7 +806,7 @@ inline void CodeGeneratorResponse::set_allocated_error(::std::string* error) {
     error_ = error;
   } else {
     clear_has_error();
-    error_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+    error_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
   }
 }
 
diff --git a/third_party/protobuf/src/google/protobuf/descriptor.cc b/third_party/protobuf/src/google/protobuf/descriptor.cc
index bcbf1e0..c2bc81a 100644
--- a/third_party/protobuf/src/google/protobuf/descriptor.cc
+++ b/third_party/protobuf/src/google/protobuf/descriptor.cc
@@ -139,8 +139,6 @@ const int FieldDescriptor::kLastReservedNumber;
 
 namespace {
 
-const string kEmptyString;
-
 string ToCamelCase(const string& input) {
   bool capitalize_next = false;
   string result;
@@ -2757,7 +2755,7 @@ Symbol DescriptorBuilder::NewPlaceholder(const string& name,
     placeholder_name = tables_->AllocateString(
       placeholder_full_name->substr(dotpos + 1));
   } else {
-    placeholder_package = &kEmptyString;
+    placeholder_package = &::google::protobuf::internal::GetEmptyString();
     placeholder_name = placeholder_full_name;
   }
 
@@ -2843,7 +2841,7 @@ const FileDescriptor* DescriptorBuilder::NewPlaceholderFile(
   memset(placeholder, 0, sizeof(*placeholder));
 
   placeholder->name_ = tables_->AllocateString(name);
-  placeholder->package_ = &kEmptyString;
+  placeholder->package_ = &::google::protobuf::internal::GetEmptyString();
   placeholder->pool_ = pool_;
   placeholder->options_ = &FileOptions::default_instance();
   placeholder->tables_ = &FileDescriptorTables::kEmpty;
@@ -3485,7 +3483,7 @@ void DescriptorBuilder::BuildFieldOrExtension(const FieldDescriptorProto& proto,
           result->default_value_enum_ = NULL;
           break;
         case FieldDescriptor::CPPTYPE_STRING:
-          result->default_value_string_ = &kEmptyString;
+          result->default_value_string_ = &::google::protobuf::internal::GetEmptyString();
           break;
         case FieldDescriptor::CPPTYPE_MESSAGE:
           break;
diff --git a/third_party/protobuf/src/google/protobuf/descriptor.pb.cc b/third_party/protobuf/src/google/protobuf/descriptor.pb.cc
index a05414a..b8ace41 100644
--- a/third_party/protobuf/src/google/protobuf/descriptor.pb.cc
+++ b/third_party/protobuf/src/google/protobuf/descriptor.pb.cc
@@ -964,8 +964,8 @@ FileDescriptorProto::FileDescriptorProto(const FileDescriptorProto& from)
 
 void FileDescriptorProto::SharedCtor() {
   _cached_size_ = 0;
-  name_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
-  package_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+  name_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
+  package_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
   options_ = NULL;
   source_code_info_ = NULL;
   ::memset(_has_bits_, 0, sizeof(_has_bits_));
@@ -976,10 +976,10 @@ FileDescriptorProto::~FileDescriptorProto() {
 }
 
 void FileDescriptorProto::SharedDtor() {
-  if (name_ != &::google::protobuf::internal::kEmptyString) {
+  if (name_ != &::google::protobuf::internal::GetEmptyString()) {
     delete name_;
   }
-  if (package_ != &::google::protobuf::internal::kEmptyString) {
+  if (package_ != &::google::protobuf::internal::GetEmptyString()) {
     delete package_;
   }
   if (this != default_instance_) {
@@ -1012,12 +1012,12 @@ FileDescriptorProto* FileDescriptorProto::New() const {
 void FileDescriptorProto::Clear() {
   if (_has_bits_[0 / 32] & (0xffu << (0 % 32))) {
     if (has_name()) {
-      if (name_ != &::google::protobuf::internal::kEmptyString) {
+      if (name_ != &::google::protobuf::internal::GetEmptyString()) {
         name_->clear();
       }
     }
     if (has_package()) {
-      if (package_ != &::google::protobuf::internal::kEmptyString) {
+      if (package_ != &::google::protobuf::internal::GetEmptyString()) {
         package_->clear();
       }
     }
@@ -1904,7 +1904,7 @@ DescriptorProto::DescriptorProto(const DescriptorProto& from)
 
 void DescriptorProto::SharedCtor() {
   _cached_size_ = 0;
-  name_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+  name_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
   options_ = NULL;
   ::memset(_has_bits_, 0, sizeof(_has_bits_));
 }
@@ -1914,7 +1914,7 @@ DescriptorProto::~DescriptorProto() {
 }
 
 void DescriptorProto::SharedDtor() {
-  if (name_ != &::google::protobuf::internal::kEmptyString) {
+  if (name_ != &::google::protobuf::internal::GetEmptyString()) {
     delete name_;
   }
   if (this != default_instance_) {
@@ -1946,7 +1946,7 @@ DescriptorProto* DescriptorProto::New() const {
 void DescriptorProto::Clear() {
   if (_has_bits_[0 / 32] & (0xffu << (0 % 32))) {
     if (has_name()) {
-      if (name_ != &::google::protobuf::internal::kEmptyString) {
+      if (name_ != &::google::protobuf::internal::GetEmptyString()) {
         name_->clear();
       }
     }
@@ -2466,13 +2466,13 @@ FieldDescriptorProto::FieldDescriptorProto(const FieldDescriptorProto& from)
 
 void FieldDescriptorProto::SharedCtor() {
   _cached_size_ = 0;
-  name_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+  name_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
   number_ = 0;
   label_ = 1;
   type_ = 1;
-  type_name_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
-  extendee_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
-  default_value_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+  type_name_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
+  extendee_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
+  default_value_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
   options_ = NULL;
   ::memset(_has_bits_, 0, sizeof(_has_bits_));
 }
@@ -2482,16 +2482,16 @@ FieldDescriptorProto::~FieldDescriptorProto() {
 }
 
 void FieldDescriptorProto::SharedDtor() {
-  if (name_ != &::google::protobuf::internal::kEmptyString) {
+  if (name_ != &::google::protobuf::internal::GetEmptyString()) {
     delete name_;
   }
-  if (type_name_ != &::google::protobuf::internal::kEmptyString) {
+  if (type_name_ != &::google::protobuf::internal::GetEmptyString()) {
     delete type_name_;
   }
-  if (extendee_ != &::google::protobuf::internal::kEmptyString) {
+  if (extendee_ != &::google::protobuf::internal::GetEmptyString()) {
     delete extendee_;
   }
-  if (default_value_ != &::google::protobuf::internal::kEmptyString) {
+  if (default_value_ != &::google::protobuf::internal::GetEmptyString()) {
     delete default_value_;
   }
   if (this != default_instance_) {
@@ -2523,7 +2523,7 @@ FieldDescriptorProto* FieldDescriptorProto::New() const {
 void FieldDescriptorProto::Clear() {
   if (_has_bits_[0 / 32] & (0xffu << (0 % 32))) {
     if (has_name()) {
-      if (name_ != &::google::protobuf::internal::kEmptyString) {
+      if (name_ != &::google::protobuf::internal::GetEmptyString()) {
         name_->clear();
       }
     }
@@ -2531,17 +2531,17 @@ void FieldDescriptorProto::Clear() {
     label_ = 1;
     type_ = 1;
     if (has_type_name()) {
-      if (type_name_ != &::google::protobuf::internal::kEmptyString) {
+      if (type_name_ != &::google::protobuf::internal::GetEmptyString()) {
         type_name_->clear();
       }
     }
     if (has_extendee()) {
-      if (extendee_ != &::google::protobuf::internal::kEmptyString) {
+      if (extendee_ != &::google::protobuf::internal::GetEmptyString()) {
         extendee_->clear();
       }
     }
     if (has_default_value()) {
-      if (default_value_ != &::google::protobuf::internal::kEmptyString) {
+      if (default_value_ != &::google::protobuf::internal::GetEmptyString()) {
         default_value_->clear();
       }
     }
@@ -3037,7 +3037,7 @@ EnumDescriptorProto::EnumDescriptorProto(const EnumDescriptorProto& from)
 
 void EnumDescriptorProto::SharedCtor() {
   _cached_size_ = 0;
-  name_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+  name_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
   options_ = NULL;
   ::memset(_has_bits_, 0, sizeof(_has_bits_));
 }
@@ -3047,7 +3047,7 @@ EnumDescriptorProto::~EnumDescriptorProto() {
 }
 
 void EnumDescriptorProto::SharedDtor() {
-  if (name_ != &::google::protobuf::internal::kEmptyString) {
+  if (name_ != &::google::protobuf::internal::GetEmptyString()) {
     delete name_;
   }
   if (this != default_instance_) {
@@ -3079,7 +3079,7 @@ EnumDescriptorProto* EnumDescriptorProto::New() const {
 void EnumDescriptorProto::Clear() {
   if (_has_bits_[0 / 32] & (0xffu << (0 % 32))) {
     if (has_name()) {
-      if (name_ != &::google::protobuf::internal::kEmptyString) {
+      if (name_ != &::google::protobuf::internal::GetEmptyString()) {
         name_->clear();
       }
     }
@@ -3353,7 +3353,7 @@ EnumValueDescriptorProto::EnumValueDescriptorProto(const EnumValueDescriptorProt
 
 void EnumValueDescriptorProto::SharedCtor() {
   _cached_size_ = 0;
-  name_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+  name_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
   number_ = 0;
   options_ = NULL;
   ::memset(_has_bits_, 0, sizeof(_has_bits_));
@@ -3364,7 +3364,7 @@ EnumValueDescriptorProto::~EnumValueDescriptorProto() {
 }
 
 void EnumValueDescriptorProto::SharedDtor() {
-  if (name_ != &::google::protobuf::internal::kEmptyString) {
+  if (name_ != &::google::protobuf::internal::GetEmptyString()) {
     delete name_;
   }
   if (this != default_instance_) {
@@ -3396,7 +3396,7 @@ EnumValueDescriptorProto* EnumValueDescriptorProto::New() const {
 void EnumValueDescriptorProto::Clear() {
   if (_has_bits_[0 / 32] & (0xffu << (0 % 32))) {
     if (has_name()) {
-      if (name_ != &::google::protobuf::internal::kEmptyString) {
+      if (name_ != &::google::protobuf::internal::GetEmptyString()) {
         name_->clear();
       }
     }
@@ -3666,7 +3666,7 @@ ServiceDescriptorProto::ServiceDescriptorProto(const ServiceDescriptorProto& fro
 
 void ServiceDescriptorProto::SharedCtor() {
   _cached_size_ = 0;
-  name_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+  name_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
   options_ = NULL;
   ::memset(_has_bits_, 0, sizeof(_has_bits_));
 }
@@ -3676,7 +3676,7 @@ ServiceDescriptorProto::~ServiceDescriptorProto() {
 }
 
 void ServiceDescriptorProto::SharedDtor() {
-  if (name_ != &::google::protobuf::internal::kEmptyString) {
+  if (name_ != &::google::protobuf::internal::GetEmptyString()) {
     delete name_;
   }
   if (this != default_instance_) {
@@ -3708,7 +3708,7 @@ ServiceDescriptorProto* ServiceDescriptorProto::New() const {
 void ServiceDescriptorProto::Clear() {
   if (_has_bits_[0 / 32] & (0xffu << (0 % 32))) {
     if (has_name()) {
-      if (name_ != &::google::protobuf::internal::kEmptyString) {
+      if (name_ != &::google::protobuf::internal::GetEmptyString()) {
         name_->clear();
       }
     }
@@ -3983,9 +3983,9 @@ MethodDescriptorProto::MethodDescriptorProto(const MethodDescriptorProto& from)
 
 void MethodDescriptorProto::SharedCtor() {
   _cached_size_ = 0;
-  name_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
-  input_type_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
-  output_type_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+  name_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
+  input_type_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
+  output_type_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
   options_ = NULL;
   ::memset(_has_bits_, 0, sizeof(_has_bits_));
 }
@@ -3995,13 +3995,13 @@ MethodDescriptorProto::~MethodDescriptorProto() {
 }
 
 void MethodDescriptorProto::SharedDtor() {
-  if (name_ != &::google::protobuf::internal::kEmptyString) {
+  if (name_ != &::google::protobuf::internal::GetEmptyString()) {
     delete name_;
   }
-  if (input_type_ != &::google::protobuf::internal::kEmptyString) {
+  if (input_type_ != &::google::protobuf::internal::GetEmptyString()) {
     delete input_type_;
   }
-  if (output_type_ != &::google::protobuf::internal::kEmptyString) {
+  if (output_type_ != &::google::protobuf::internal::GetEmptyString()) {
     delete output_type_;
   }
   if (this != default_instance_) {
@@ -4033,17 +4033,17 @@ MethodDescriptorProto* MethodDescriptorProto::New() const {
 void MethodDescriptorProto::Clear() {
   if (_has_bits_[0 / 32] & (0xffu << (0 % 32))) {
     if (has_name()) {
-      if (name_ != &::google::protobuf::internal::kEmptyString) {
+      if (name_ != &::google::protobuf::internal::GetEmptyString()) {
         name_->clear();
       }
     }
     if (has_input_type()) {
-      if (input_type_ != &::google::protobuf::internal::kEmptyString) {
+      if (input_type_ != &::google::protobuf::internal::GetEmptyString()) {
         input_type_->clear();
       }
     }
     if (has_output_type()) {
-      if (output_type_ != &::google::protobuf::internal::kEmptyString) {
+      if (output_type_ != &::google::protobuf::internal::GetEmptyString()) {
         output_type_->clear();
       }
     }
@@ -4399,13 +4399,13 @@ FileOptions::FileOptions(const FileOptions& from)
 
 void FileOptions::SharedCtor() {
   _cached_size_ = 0;
-  java_package_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
-  java_outer_classname_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+  java_package_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
+  java_outer_classname_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
   java_multiple_files_ = false;
   retain_unknown_fields_ = false;
   java_generate_equals_and_hash_ = false;
   optimize_for_ = 1;
-  go_package_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+  go_package_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
   cc_generic_services_ = false;
   java_generic_services_ = false;
   py_generic_services_ = false;
@@ -4417,13 +4417,13 @@ FileOptions::~FileOptions() {
 }
 
 void FileOptions::SharedDtor() {
-  if (java_package_ != &::google::protobuf::internal::kEmptyString) {
+  if (java_package_ != &::google::protobuf::internal::GetEmptyString()) {
     delete java_package_;
   }
-  if (java_outer_classname_ != &::google::protobuf::internal::kEmptyString) {
+  if (java_outer_classname_ != &::google::protobuf::internal::GetEmptyString()) {
     delete java_outer_classname_;
   }
-  if (go_package_ != &::google::protobuf::internal::kEmptyString) {
+  if (go_package_ != &::google::protobuf::internal::GetEmptyString()) {
     delete go_package_;
   }
   if (this != default_instance_) {
@@ -4455,12 +4455,12 @@ void FileOptions::Clear() {
   _extensions_.Clear();
   if (_has_bits_[0 / 32] & (0xffu << (0 % 32))) {
     if (has_java_package()) {
-      if (java_package_ != &::google::protobuf::internal::kEmptyString) {
+      if (java_package_ != &::google::protobuf::internal::GetEmptyString()) {
         java_package_->clear();
       }
     }
     if (has_java_outer_classname()) {
-      if (java_outer_classname_ != &::google::protobuf::internal::kEmptyString) {
+      if (java_outer_classname_ != &::google::protobuf::internal::GetEmptyString()) {
         java_outer_classname_->clear();
       }
     }
@@ -4469,7 +4469,7 @@ void FileOptions::Clear() {
     java_generate_equals_and_hash_ = false;
     optimize_for_ = 1;
     if (has_go_package()) {
-      if (go_package_ != &::google::protobuf::internal::kEmptyString) {
+      if (go_package_ != &::google::protobuf::internal::GetEmptyString()) {
         go_package_->clear();
       }
     }
@@ -5409,7 +5409,7 @@ void FieldOptions::SharedCtor() {
   packed_ = false;
   lazy_ = false;
   deprecated_ = false;
-  experimental_map_key_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+  experimental_map_key_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
   weak_ = false;
   ::memset(_has_bits_, 0, sizeof(_has_bits_));
 }
@@ -5419,7 +5419,7 @@ FieldOptions::~FieldOptions() {
 }
 
 void FieldOptions::SharedDtor() {
-  if (experimental_map_key_ != &::google::protobuf::internal::kEmptyString) {
+  if (experimental_map_key_ != &::google::protobuf::internal::GetEmptyString()) {
     delete experimental_map_key_;
   }
   if (this != default_instance_) {
@@ -5455,7 +5455,7 @@ void FieldOptions::Clear() {
     lazy_ = false;
     deprecated_ = false;
     if (has_experimental_map_key()) {
-      if (experimental_map_key_ != &::google::protobuf::internal::kEmptyString) {
+      if (experimental_map_key_ != &::google::protobuf::internal::GetEmptyString()) {
         experimental_map_key_->clear();
       }
     }
@@ -6828,7 +6828,7 @@ UninterpretedOption_NamePart::UninterpretedOption_NamePart(const UninterpretedOp
 
 void UninterpretedOption_NamePart::SharedCtor() {
   _cached_size_ = 0;
-  name_part_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+  name_part_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
   is_extension_ = false;
   ::memset(_has_bits_, 0, sizeof(_has_bits_));
 }
@@ -6838,7 +6838,7 @@ UninterpretedOption_NamePart::~UninterpretedOption_NamePart() {
 }
 
 void UninterpretedOption_NamePart::SharedDtor() {
-  if (name_part_ != &::google::protobuf::internal::kEmptyString) {
+  if (name_part_ != &::google::protobuf::internal::GetEmptyString()) {
     delete name_part_;
   }
   if (this != default_instance_) {
@@ -6869,7 +6869,7 @@ UninterpretedOption_NamePart* UninterpretedOption_NamePart::New() const {
 void UninterpretedOption_NamePart::Clear() {
   if (_has_bits_[0 / 32] & (0xffu << (0 % 32))) {
     if (has_name_part()) {
-      if (name_part_ != &::google::protobuf::internal::kEmptyString) {
+      if (name_part_ != &::google::protobuf::internal::GetEmptyString()) {
         name_part_->clear();
       }
     }
@@ -7097,12 +7097,12 @@ UninterpretedOption::UninterpretedOption(const UninterpretedOption& from)
 
 void UninterpretedOption::SharedCtor() {
   _cached_size_ = 0;
-  identifier_value_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+  identifier_value_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
   positive_int_value_ = GOOGLE_ULONGLONG(0);
   negative_int_value_ = GOOGLE_LONGLONG(0);
   double_value_ = 0;
-  string_value_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
-  aggregate_value_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+  string_value_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
+  aggregate_value_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
   ::memset(_has_bits_, 0, sizeof(_has_bits_));
 }
 
@@ -7111,13 +7111,13 @@ UninterpretedOption::~UninterpretedOption() {
 }
 
 void UninterpretedOption::SharedDtor() {
-  if (identifier_value_ != &::google::protobuf::internal::kEmptyString) {
+  if (identifier_value_ != &::google::protobuf::internal::GetEmptyString()) {
     delete identifier_value_;
   }
-  if (string_value_ != &::google::protobuf::internal::kEmptyString) {
+  if (string_value_ != &::google::protobuf::internal::GetEmptyString()) {
     delete string_value_;
   }
-  if (aggregate_value_ != &::google::protobuf::internal::kEmptyString) {
+  if (aggregate_value_ != &::google::protobuf::internal::GetEmptyString()) {
     delete aggregate_value_;
   }
   if (this != default_instance_) {
@@ -7148,7 +7148,7 @@ UninterpretedOption* UninterpretedOption::New() const {
 void UninterpretedOption::Clear() {
   if (_has_bits_[1 / 32] & (0xffu << (1 % 32))) {
     if (has_identifier_value()) {
-      if (identifier_value_ != &::google::protobuf::internal::kEmptyString) {
+      if (identifier_value_ != &::google::protobuf::internal::GetEmptyString()) {
         identifier_value_->clear();
       }
     }
@@ -7156,12 +7156,12 @@ void UninterpretedOption::Clear() {
     negative_int_value_ = GOOGLE_LONGLONG(0);
     double_value_ = 0;
     if (has_string_value()) {
-      if (string_value_ != &::google::protobuf::internal::kEmptyString) {
+      if (string_value_ != &::google::protobuf::internal::GetEmptyString()) {
         string_value_->clear();
       }
     }
     if (has_aggregate_value()) {
-      if (aggregate_value_ != &::google::protobuf::internal::kEmptyString) {
+      if (aggregate_value_ != &::google::protobuf::internal::GetEmptyString()) {
         aggregate_value_->clear();
       }
     }
@@ -7586,8 +7586,8 @@ SourceCodeInfo_Location::SourceCodeInfo_Location(const SourceCodeInfo_Location&
 
 void SourceCodeInfo_Location::SharedCtor() {
   _cached_size_ = 0;
-  leading_comments_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
-  trailing_comments_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+  leading_comments_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
+  trailing_comments_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
   ::memset(_has_bits_, 0, sizeof(_has_bits_));
 }
 
@@ -7596,10 +7596,10 @@ SourceCodeInfo_Location::~SourceCodeInfo_Location() {
 }
 
 void SourceCodeInfo_Location::SharedDtor() {
-  if (leading_comments_ != &::google::protobuf::internal::kEmptyString) {
+  if (leading_comments_ != &::google::protobuf::internal::GetEmptyString()) {
     delete leading_comments_;
   }
-  if (trailing_comments_ != &::google::protobuf::internal::kEmptyString) {
+  if (trailing_comments_ != &::google::protobuf::internal::GetEmptyString()) {
     delete trailing_comments_;
   }
   if (this != default_instance_) {
@@ -7630,12 +7630,12 @@ SourceCodeInfo_Location* SourceCodeInfo_Location::New() const {
 void SourceCodeInfo_Location::Clear() {
   if (_has_bits_[2 / 32] & (0xffu << (2 % 32))) {
     if (has_leading_comments()) {
-      if (leading_comments_ != &::google::protobuf::internal::kEmptyString) {
+      if (leading_comments_ != &::google::protobuf::internal::GetEmptyString()) {
         leading_comments_->clear();
       }
     }
     if (has_trailing_comments()) {
-      if (trailing_comments_ != &::google::protobuf::internal::kEmptyString) {
+      if (trailing_comments_ != &::google::protobuf::internal::GetEmptyString()) {
         trailing_comments_->clear();
       }
     }
diff --git a/third_party/protobuf/src/google/protobuf/descriptor.pb.h b/third_party/protobuf/src/google/protobuf/descriptor.pb.h
index f6b83ce..e9990d1 100644
--- a/third_party/protobuf/src/google/protobuf/descriptor.pb.h
+++ b/third_party/protobuf/src/google/protobuf/descriptor.pb.h
@@ -2815,7 +2815,7 @@ inline void FileDescriptorProto::clear_has_name() {
   _has_bits_[0] &= ~0x00000001u;
 }
 inline void FileDescriptorProto::clear_name() {
-  if (name_ != &::google::protobuf::internal::kEmptyString) {
+  if (name_ != &::google::protobuf::internal::GetEmptyString()) {
     name_->clear();
   }
   clear_has_name();
@@ -2825,44 +2825,44 @@ inline const ::std::string& FileDescriptorProto::name() const {
 }
 inline void FileDescriptorProto::set_name(const ::std::string& value) {
   set_has_name();
-  if (name_ == &::google::protobuf::internal::kEmptyString) {
+  if (name_ == &::google::protobuf::internal::GetEmptyString()) {
     name_ = new ::std::string;
   }
   name_->assign(value);
 }
 inline void FileDescriptorProto::set_name(const char* value) {
   set_has_name();
-  if (name_ == &::google::protobuf::internal::kEmptyString) {
+  if (name_ == &::google::protobuf::internal::GetEmptyString()) {
     name_ = new ::std::string;
   }
   name_->assign(value);
 }
 inline void FileDescriptorProto::set_name(const char* value, size_t size) {
   set_has_name();
-  if (name_ == &::google::protobuf::internal::kEmptyString) {
+  if (name_ == &::google::protobuf::internal::GetEmptyString()) {
     name_ = new ::std::string;
   }
   name_->assign(reinterpret_cast<const char*>(value), size);
 }
 inline ::std::string* FileDescriptorProto::mutable_name() {
   set_has_name();
-  if (name_ == &::google::protobuf::internal::kEmptyString) {
+  if (name_ == &::google::protobuf::internal::GetEmptyString()) {
     name_ = new ::std::string;
   }
   return name_;
 }
 inline ::std::string* FileDescriptorProto::release_name() {
   clear_has_name();
-  if (name_ == &::google::protobuf::internal::kEmptyString) {
+  if (name_ == &::google::protobuf::internal::GetEmptyString()) {
     return NULL;
   } else {
     ::std::string* temp = name_;
-    name_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+    name_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
     return temp;
   }
 }
 inline void FileDescriptorProto::set_allocated_name(::std::string* name) {
-  if (name_ != &::google::protobuf::internal::kEmptyString) {
+  if (name_ != &::google::protobuf::internal::GetEmptyString()) {
     delete name_;
   }
   if (name) {
@@ -2870,7 +2870,7 @@ inline void FileDescriptorProto::set_allocated_name(::std::string* name) {
     name_ = name;
   } else {
     clear_has_name();
-    name_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+    name_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
   }
 }
 
@@ -2885,7 +2885,7 @@ inline void FileDescriptorProto::clear_has_package() {
   _has_bits_[0] &= ~0x00000002u;
 }
 inline void FileDescriptorProto::clear_package() {
-  if (package_ != &::google::protobuf::internal::kEmptyString) {
+  if (package_ != &::google::protobuf::internal::GetEmptyString()) {
     package_->clear();
   }
   clear_has_package();
@@ -2895,44 +2895,44 @@ inline const ::std::string& FileDescriptorProto::package() const {
 }
 inline void FileDescriptorProto::set_package(const ::std::string& value) {
   set_has_package();
-  if (package_ == &::google::protobuf::internal::kEmptyString) {
+  if (package_ == &::google::protobuf::internal::GetEmptyString()) {
     package_ = new ::std::string;
   }
   package_->assign(value);
 }
 inline void FileDescriptorProto::set_package(const char* value) {
   set_has_package();
-  if (package_ == &::google::protobuf::internal::kEmptyString) {
+  if (package_ == &::google::protobuf::internal::GetEmptyString()) {
     package_ = new ::std::string;
   }
   package_->assign(value);
 }
 inline void FileDescriptorProto::set_package(const char* value, size_t size) {
   set_has_package();
-  if (package_ == &::google::protobuf::internal::kEmptyString) {
+  if (package_ == &::google::protobuf::internal::GetEmptyString()) {
     package_ = new ::std::string;
   }
   package_->assign(reinterpret_cast<const char*>(value), size);
 }
 inline ::std::string* FileDescriptorProto::mutable_package() {
   set_has_package();
-  if (package_ == &::google::protobuf::internal::kEmptyString) {
+  if (package_ == &::google::protobuf::internal::GetEmptyString()) {
     package_ = new ::std::string;
   }
   return package_;
 }
 inline ::std::string* FileDescriptorProto::release_package() {
   clear_has_package();
-  if (package_ == &::google::protobuf::internal::kEmptyString) {
+  if (package_ == &::google::protobuf::internal::GetEmptyString()) {
     return NULL;
   } else {
     ::std::string* temp = package_;
-    package_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+    package_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
     return temp;
   }
 }
 inline void FileDescriptorProto::set_allocated_package(::std::string* package) {
-  if (package_ != &::google::protobuf::internal::kEmptyString) {
+  if (package_ != &::google::protobuf::internal::GetEmptyString()) {
     delete package_;
   }
   if (package) {
@@ -2940,7 +2940,7 @@ inline void FileDescriptorProto::set_allocated_package(::std::string* package) {
     package_ = package;
   } else {
     clear_has_package();
-    package_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+    package_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
   }
 }
 
@@ -3277,7 +3277,7 @@ inline void DescriptorProto::clear_has_name() {
   _has_bits_[0] &= ~0x00000001u;
 }
 inline void DescriptorProto::clear_name() {
-  if (name_ != &::google::protobuf::internal::kEmptyString) {
+  if (name_ != &::google::protobuf::internal::GetEmptyString()) {
     name_->clear();
   }
   clear_has_name();
@@ -3287,44 +3287,44 @@ inline const ::std::string& DescriptorProto::name() const {
 }
 inline void DescriptorProto::set_name(const ::std::string& value) {
   set_has_name();
-  if (name_ == &::google::protobuf::internal::kEmptyString) {
+  if (name_ == &::google::protobuf::internal::GetEmptyString()) {
     name_ = new ::std::string;
   }
   name_->assign(value);
 }
 inline void DescriptorProto::set_name(const char* value) {
   set_has_name();
-  if (name_ == &::google::protobuf::internal::kEmptyString) {
+  if (name_ == &::google::protobuf::internal::GetEmptyString()) {
     name_ = new ::std::string;
   }
   name_->assign(value);
 }
 inline void DescriptorProto::set_name(const char* value, size_t size) {
   set_has_name();
-  if (name_ == &::google::protobuf::internal::kEmptyString) {
+  if (name_ == &::google::protobuf::internal::GetEmptyString()) {
     name_ = new ::std::string;
   }
   name_->assign(reinterpret_cast<const char*>(value), size);
 }
 inline ::std::string* DescriptorProto::mutable_name() {
   set_has_name();
-  if (name_ == &::google::protobuf::internal::kEmptyString) {
+  if (name_ == &::google::protobuf::internal::GetEmptyString()) {
     name_ = new ::std::string;
   }
   return name_;
 }
 inline ::std::string* DescriptorProto::release_name() {
   clear_has_name();
-  if (name_ == &::google::protobuf::internal::kEmptyString) {
+  if (name_ == &::google::protobuf::internal::GetEmptyString()) {
     return NULL;
   } else {
     ::std::string* temp = name_;
-    name_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+    name_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
     return temp;
   }
 }
 inline void DescriptorProto::set_allocated_name(::std::string* name) {
-  if (name_ != &::google::protobuf::internal::kEmptyString) {
+  if (name_ != &::google::protobuf::internal::GetEmptyString()) {
     delete name_;
   }
   if (name) {
@@ -3332,7 +3332,7 @@ inline void DescriptorProto::set_allocated_name(::std::string* name) {
     name_ = name;
   } else {
     clear_has_name();
-    name_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+    name_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
   }
 }
 
@@ -3514,7 +3514,7 @@ inline void FieldDescriptorProto::clear_has_name() {
   _has_bits_[0] &= ~0x00000001u;
 }
 inline void FieldDescriptorProto::clear_name() {
-  if (name_ != &::google::protobuf::internal::kEmptyString) {
+  if (name_ != &::google::protobuf::internal::GetEmptyString()) {
     name_->clear();
   }
   clear_has_name();
@@ -3524,44 +3524,44 @@ inline const ::std::string& FieldDescriptorProto::name() const {
 }
 inline void FieldDescriptorProto::set_name(const ::std::string& value) {
   set_has_name();
-  if (name_ == &::google::protobuf::internal::kEmptyString) {
+  if (name_ == &::google::protobuf::internal::GetEmptyString()) {
     name_ = new ::std::string;
   }
   name_->assign(value);
 }
 inline void FieldDescriptorProto::set_name(const char* value) {
   set_has_name();
-  if (name_ == &::google::protobuf::internal::kEmptyString) {
+  if (name_ == &::google::protobuf::internal::GetEmptyString()) {
     name_ = new ::std::string;
   }
   name_->assign(value);
 }
 inline void FieldDescriptorProto::set_name(const char* value, size_t size) {
   set_has_name();
-  if (name_ == &::google::protobuf::internal::kEmptyString) {
+  if (name_ == &::google::protobuf::internal::GetEmptyString()) {
     name_ = new ::std::string;
   }
   name_->assign(reinterpret_cast<const char*>(value), size);
 }
 inline ::std::string* FieldDescriptorProto::mutable_name() {
   set_has_name();
-  if (name_ == &::google::protobuf::internal::kEmptyString) {
+  if (name_ == &::google::protobuf::internal::GetEmptyString()) {
     name_ = new ::std::string;
   }
   return name_;
 }
 inline ::std::string* FieldDescriptorProto::release_name() {
   clear_has_name();
-  if (name_ == &::google::protobuf::internal::kEmptyString) {
+  if (name_ == &::google::protobuf::internal::GetEmptyString()) {
     return NULL;
   } else {
     ::std::string* temp = name_;
-    name_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+    name_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
     return temp;
   }
 }
 inline void FieldDescriptorProto::set_allocated_name(::std::string* name) {
-  if (name_ != &::google::protobuf::internal::kEmptyString) {
+  if (name_ != &::google::protobuf::internal::GetEmptyString()) {
     delete name_;
   }
   if (name) {
@@ -3569,7 +3569,7 @@ inline void FieldDescriptorProto::set_allocated_name(::std::string* name) {
     name_ = name;
   } else {
     clear_has_name();
-    name_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+    name_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
   }
 }
 
@@ -3652,7 +3652,7 @@ inline void FieldDescriptorProto::clear_has_type_name() {
   _has_bits_[0] &= ~0x00000010u;
 }
 inline void FieldDescriptorProto::clear_type_name() {
-  if (type_name_ != &::google::protobuf::internal::kEmptyString) {
+  if (type_name_ != &::google::protobuf::internal::GetEmptyString()) {
     type_name_->clear();
   }
   clear_has_type_name();
@@ -3662,44 +3662,44 @@ inline const ::std::string& FieldDescriptorProto::type_name() const {
 }
 inline void FieldDescriptorProto::set_type_name(const ::std::string& value) {
   set_has_type_name();
-  if (type_name_ == &::google::protobuf::internal::kEmptyString) {
+  if (type_name_ == &::google::protobuf::internal::GetEmptyString()) {
     type_name_ = new ::std::string;
   }
   type_name_->assign(value);
 }
 inline void FieldDescriptorProto::set_type_name(const char* value) {
   set_has_type_name();
-  if (type_name_ == &::google::protobuf::internal::kEmptyString) {
+  if (type_name_ == &::google::protobuf::internal::GetEmptyString()) {
     type_name_ = new ::std::string;
   }
   type_name_->assign(value);
 }
 inline void FieldDescriptorProto::set_type_name(const char* value, size_t size) {
   set_has_type_name();
-  if (type_name_ == &::google::protobuf::internal::kEmptyString) {
+  if (type_name_ == &::google::protobuf::internal::GetEmptyString()) {
     type_name_ = new ::std::string;
   }
   type_name_->assign(reinterpret_cast<const char*>(value), size);
 }
 inline ::std::string* FieldDescriptorProto::mutable_type_name() {
   set_has_type_name();
-  if (type_name_ == &::google::protobuf::internal::kEmptyString) {
+  if (type_name_ == &::google::protobuf::internal::GetEmptyString()) {
     type_name_ = new ::std::string;
   }
   return type_name_;
 }
 inline ::std::string* FieldDescriptorProto::release_type_name() {
   clear_has_type_name();
-  if (type_name_ == &::google::protobuf::internal::kEmptyString) {
+  if (type_name_ == &::google::protobuf::internal::GetEmptyString()) {
     return NULL;
   } else {
     ::std::string* temp = type_name_;
-    type_name_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+    type_name_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
     return temp;
   }
 }
 inline void FieldDescriptorProto::set_allocated_type_name(::std::string* type_name) {
-  if (type_name_ != &::google::protobuf::internal::kEmptyString) {
+  if (type_name_ != &::google::protobuf::internal::GetEmptyString()) {
     delete type_name_;
   }
   if (type_name) {
@@ -3707,7 +3707,7 @@ inline void FieldDescriptorProto::set_allocated_type_name(::std::string* type_na
     type_name_ = type_name;
   } else {
     clear_has_type_name();
-    type_name_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+    type_name_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
   }
 }
 
@@ -3722,7 +3722,7 @@ inline void FieldDescriptorProto::clear_has_extendee() {
   _has_bits_[0] &= ~0x00000020u;
 }
 inline void FieldDescriptorProto::clear_extendee() {
-  if (extendee_ != &::google::protobuf::internal::kEmptyString) {
+  if (extendee_ != &::google::protobuf::internal::GetEmptyString()) {
     extendee_->clear();
   }
   clear_has_extendee();
@@ -3732,44 +3732,44 @@ inline const ::std::string& FieldDescriptorProto::extendee() const {
 }
 inline void FieldDescriptorProto::set_extendee(const ::std::string& value) {
   set_has_extendee();
-  if (extendee_ == &::google::protobuf::internal::kEmptyString) {
+  if (extendee_ == &::google::protobuf::internal::GetEmptyString()) {
     extendee_ = new ::std::string;
   }
   extendee_->assign(value);
 }
 inline void FieldDescriptorProto::set_extendee(const char* value) {
   set_has_extendee();
-  if (extendee_ == &::google::protobuf::internal::kEmptyString) {
+  if (extendee_ == &::google::protobuf::internal::GetEmptyString()) {
     extendee_ = new ::std::string;
   }
   extendee_->assign(value);
 }
 inline void FieldDescriptorProto::set_extendee(const char* value, size_t size) {
   set_has_extendee();
-  if (extendee_ == &::google::protobuf::internal::kEmptyString) {
+  if (extendee_ == &::google::protobuf::internal::GetEmptyString()) {
     extendee_ = new ::std::string;
   }
   extendee_->assign(reinterpret_cast<const char*>(value), size);
 }
 inline ::std::string* FieldDescriptorProto::mutable_extendee() {
   set_has_extendee();
-  if (extendee_ == &::google::protobuf::internal::kEmptyString) {
+  if (extendee_ == &::google::protobuf::internal::GetEmptyString()) {
     extendee_ = new ::std::string;
   }
   return extendee_;
 }
 inline ::std::string* FieldDescriptorProto::release_extendee() {
   clear_has_extendee();
-  if (extendee_ == &::google::protobuf::internal::kEmptyString) {
+  if (extendee_ == &::google::protobuf::internal::GetEmptyString()) {
     return NULL;
   } else {
     ::std::string* temp = extendee_;
-    extendee_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+    extendee_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
     return temp;
   }
 }
 inline void FieldDescriptorProto::set_allocated_extendee(::std::string* extendee) {
-  if (extendee_ != &::google::protobuf::internal::kEmptyString) {
+  if (extendee_ != &::google::protobuf::internal::GetEmptyString()) {
     delete extendee_;
   }
   if (extendee) {
@@ -3777,7 +3777,7 @@ inline void FieldDescriptorProto::set_allocated_extendee(::std::string* extendee
     extendee_ = extendee;
   } else {
     clear_has_extendee();
-    extendee_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+    extendee_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
   }
 }
 
@@ -3792,7 +3792,7 @@ inline void FieldDescriptorProto::clear_has_default_value() {
   _has_bits_[0] &= ~0x00000040u;
 }
 inline void FieldDescriptorProto::clear_default_value() {
-  if (default_value_ != &::google::protobuf::internal::kEmptyString) {
+  if (default_value_ != &::google::protobuf::internal::GetEmptyString()) {
     default_value_->clear();
   }
   clear_has_default_value();
@@ -3802,44 +3802,44 @@ inline const ::std::string& FieldDescriptorProto::default_value() const {
 }
 inline void FieldDescriptorProto::set_default_value(const ::std::string& value) {
   set_has_default_value();
-  if (default_value_ == &::google::protobuf::internal::kEmptyString) {
+  if (default_value_ == &::google::protobuf::internal::GetEmptyString()) {
     default_value_ = new ::std::string;
   }
   default_value_->assign(value);
 }
 inline void FieldDescriptorProto::set_default_value(const char* value) {
   set_has_default_value();
-  if (default_value_ == &::google::protobuf::internal::kEmptyString) {
+  if (default_value_ == &::google::protobuf::internal::GetEmptyString()) {
     default_value_ = new ::std::string;
   }
   default_value_->assign(value);
 }
 inline void FieldDescriptorProto::set_default_value(const char* value, size_t size) {
   set_has_default_value();
-  if (default_value_ == &::google::protobuf::internal::kEmptyString) {
+  if (default_value_ == &::google::protobuf::internal::GetEmptyString()) {
     default_value_ = new ::std::string;
   }
   default_value_->assign(reinterpret_cast<const char*>(value), size);
 }
 inline ::std::string* FieldDescriptorProto::mutable_default_value() {
   set_has_default_value();
-  if (default_value_ == &::google::protobuf::internal::kEmptyString) {
+  if (default_value_ == &::google::protobuf::internal::GetEmptyString()) {
     default_value_ = new ::std::string;
   }
   return default_value_;
 }
 inline ::std::string* FieldDescriptorProto::release_default_value() {
   clear_has_default_value();
-  if (default_value_ == &::google::protobuf::internal::kEmptyString) {
+  if (default_value_ == &::google::protobuf::internal::GetEmptyString()) {
     return NULL;
   } else {
     ::std::string* temp = default_value_;
-    default_value_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+    default_value_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
     return temp;
   }
 }
 inline void FieldDescriptorProto::set_allocated_default_value(::std::string* default_value) {
-  if (default_value_ != &::google::protobuf::internal::kEmptyString) {
+  if (default_value_ != &::google::protobuf::internal::GetEmptyString()) {
     delete default_value_;
   }
   if (default_value) {
@@ -3847,7 +3847,7 @@ inline void FieldDescriptorProto::set_allocated_default_value(::std::string* def
     default_value_ = default_value;
   } else {
     clear_has_default_value();
-    default_value_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+    default_value_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
   }
 }
 
@@ -3904,7 +3904,7 @@ inline void EnumDescriptorProto::clear_has_name() {
   _has_bits_[0] &= ~0x00000001u;
 }
 inline void EnumDescriptorProto::clear_name() {
-  if (name_ != &::google::protobuf::internal::kEmptyString) {
+  if (name_ != &::google::protobuf::internal::GetEmptyString()) {
     name_->clear();
   }
   clear_has_name();
@@ -3914,44 +3914,44 @@ inline const ::std::string& EnumDescriptorProto::name() const {
 }
 inline void EnumDescriptorProto::set_name(const ::std::string& value) {
   set_has_name();
-  if (name_ == &::google::protobuf::internal::kEmptyString) {
+  if (name_ == &::google::protobuf::internal::GetEmptyString()) {
     name_ = new ::std::string;
   }
   name_->assign(value);
 }
 inline void EnumDescriptorProto::set_name(const char* value) {
   set_has_name();
-  if (name_ == &::google::protobuf::internal::kEmptyString) {
+  if (name_ == &::google::protobuf::internal::GetEmptyString()) {
     name_ = new ::std::string;
   }
   name_->assign(value);
 }
 inline void EnumDescriptorProto::set_name(const char* value, size_t size) {
   set_has_name();
-  if (name_ == &::google::protobuf::internal::kEmptyString) {
+  if (name_ == &::google::protobuf::internal::GetEmptyString()) {
     name_ = new ::std::string;
   }
   name_->assign(reinterpret_cast<const char*>(value), size);
 }
 inline ::std::string* EnumDescriptorProto::mutable_name() {
   set_has_name();
-  if (name_ == &::google::protobuf::internal::kEmptyString) {
+  if (name_ == &::google::protobuf::internal::GetEmptyString()) {
     name_ = new ::std::string;
   }
   return name_;
 }
 inline ::std::string* EnumDescriptorProto::release_name() {
   clear_has_name();
-  if (name_ == &::google::protobuf::internal::kEmptyString) {
+  if (name_ == &::google::protobuf::internal::GetEmptyString()) {
     return NULL;
   } else {
     ::std::string* temp = name_;
-    name_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+    name_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
     return temp;
   }
 }
 inline void EnumDescriptorProto::set_allocated_name(::std::string* name) {
-  if (name_ != &::google::protobuf::internal::kEmptyString) {
+  if (name_ != &::google::protobuf::internal::GetEmptyString()) {
     delete name_;
   }
   if (name) {
@@ -3959,7 +3959,7 @@ inline void EnumDescriptorProto::set_allocated_name(::std::string* name) {
     name_ = name;
   } else {
     clear_has_name();
-    name_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+    name_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
   }
 }
 
@@ -4041,7 +4041,7 @@ inline void EnumValueDescriptorProto::clear_has_name() {
   _has_bits_[0] &= ~0x00000001u;
 }
 inline void EnumValueDescriptorProto::clear_name() {
-  if (name_ != &::google::protobuf::internal::kEmptyString) {
+  if (name_ != &::google::protobuf::internal::GetEmptyString()) {
     name_->clear();
   }
   clear_has_name();
@@ -4051,44 +4051,44 @@ inline const ::std::string& EnumValueDescriptorProto::name() const {
 }
 inline void EnumValueDescriptorProto::set_name(const ::std::string& value) {
   set_has_name();
-  if (name_ == &::google::protobuf::internal::kEmptyString) {
+  if (name_ == &::google::protobuf::internal::GetEmptyString()) {
     name_ = new ::std::string;
   }
   name_->assign(value);
 }
 inline void EnumValueDescriptorProto::set_name(const char* value) {
   set_has_name();
-  if (name_ == &::google::protobuf::internal::kEmptyString) {
+  if (name_ == &::google::protobuf::internal::GetEmptyString()) {
     name_ = new ::std::string;
   }
   name_->assign(value);
 }
 inline void EnumValueDescriptorProto::set_name(const char* value, size_t size) {
   set_has_name();
-  if (name_ == &::google::protobuf::internal::kEmptyString) {
+  if (name_ == &::google::protobuf::internal::GetEmptyString()) {
     name_ = new ::std::string;
   }
   name_->assign(reinterpret_cast<const char*>(value), size);
 }
 inline ::std::string* EnumValueDescriptorProto::mutable_name() {
   set_has_name();
-  if (name_ == &::google::protobuf::internal::kEmptyString) {
+  if (name_ == &::google::protobuf::internal::GetEmptyString()) {
     name_ = new ::std::string;
   }
   return name_;
 }
 inline ::std::string* EnumValueDescriptorProto::release_name() {
   clear_has_name();
-  if (name_ == &::google::protobuf::internal::kEmptyString) {
+  if (name_ == &::google::protobuf::internal::GetEmptyString()) {
     return NULL;
   } else {
     ::std::string* temp = name_;
-    name_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+    name_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
     return temp;
   }
 }
 inline void EnumValueDescriptorProto::set_allocated_name(::std::string* name) {
-  if (name_ != &::google::protobuf::internal::kEmptyString) {
+  if (name_ != &::google::protobuf::internal::GetEmptyString()) {
     delete name_;
   }
   if (name) {
@@ -4096,7 +4096,7 @@ inline void EnumValueDescriptorProto::set_allocated_name(::std::string* name) {
     name_ = name;
   } else {
     clear_has_name();
-    name_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+    name_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
   }
 }
 
@@ -4175,7 +4175,7 @@ inline void ServiceDescriptorProto::clear_has_name() {
   _has_bits_[0] &= ~0x00000001u;
 }
 inline void ServiceDescriptorProto::clear_name() {
-  if (name_ != &::google::protobuf::internal::kEmptyString) {
+  if (name_ != &::google::protobuf::internal::GetEmptyString()) {
     name_->clear();
   }
   clear_has_name();
@@ -4185,44 +4185,44 @@ inline const ::std::string& ServiceDescriptorProto::name() const {
 }
 inline void ServiceDescriptorProto::set_name(const ::std::string& value) {
   set_has_name();
-  if (name_ == &::google::protobuf::internal::kEmptyString) {
+  if (name_ == &::google::protobuf::internal::GetEmptyString()) {
     name_ = new ::std::string;
   }
   name_->assign(value);
 }
 inline void ServiceDescriptorProto::set_name(const char* value) {
   set_has_name();
-  if (name_ == &::google::protobuf::internal::kEmptyString) {
+  if (name_ == &::google::protobuf::internal::GetEmptyString()) {
     name_ = new ::std::string;
   }
   name_->assign(value);
 }
 inline void ServiceDescriptorProto::set_name(const char* value, size_t size) {
   set_has_name();
-  if (name_ == &::google::protobuf::internal::kEmptyString) {
+  if (name_ == &::google::protobuf::internal::GetEmptyString()) {
     name_ = new ::std::string;
   }
   name_->assign(reinterpret_cast<const char*>(value), size);
 }
 inline ::std::string* ServiceDescriptorProto::mutable_name() {
   set_has_name();
-  if (name_ == &::google::protobuf::internal::kEmptyString) {
+  if (name_ == &::google::protobuf::internal::GetEmptyString()) {
     name_ = new ::std::string;
   }
   return name_;
 }
 inline ::std::string* ServiceDescriptorProto::release_name() {
   clear_has_name();
-  if (name_ == &::google::protobuf::internal::kEmptyString) {
+  if (name_ == &::google::protobuf::internal::GetEmptyString()) {
     return NULL;
   } else {
     ::std::string* temp = name_;
-    name_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+    name_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
     return temp;
   }
 }
 inline void ServiceDescriptorProto::set_allocated_name(::std::string* name) {
-  if (name_ != &::google::protobuf::internal::kEmptyString) {
+  if (name_ != &::google::protobuf::internal::GetEmptyString()) {
     delete name_;
   }
   if (name) {
@@ -4230,7 +4230,7 @@ inline void ServiceDescriptorProto::set_allocated_name(::std::string* name) {
     name_ = name;
   } else {
     clear_has_name();
-    name_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+    name_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
   }
 }
 
@@ -4312,7 +4312,7 @@ inline void MethodDescriptorProto::clear_has_name() {
   _has_bits_[0] &= ~0x00000001u;
 }
 inline void MethodDescriptorProto::clear_name() {
-  if (name_ != &::google::protobuf::internal::kEmptyString) {
+  if (name_ != &::google::protobuf::internal::GetEmptyString()) {
     name_->clear();
   }
   clear_has_name();
@@ -4322,44 +4322,44 @@ inline const ::std::string& MethodDescriptorProto::name() const {
 }
 inline void MethodDescriptorProto::set_name(const ::std::string& value) {
   set_has_name();
-  if (name_ == &::google::protobuf::internal::kEmptyString) {
+  if (name_ == &::google::protobuf::internal::GetEmptyString()) {
     name_ = new ::std::string;
   }
   name_->assign(value);
 }
 inline void MethodDescriptorProto::set_name(const char* value) {
   set_has_name();
-  if (name_ == &::google::protobuf::internal::kEmptyString) {
+  if (name_ == &::google::protobuf::internal::GetEmptyString()) {
     name_ = new ::std::string;
   }
   name_->assign(value);
 }
 inline void MethodDescriptorProto::set_name(const char* value, size_t size) {
   set_has_name();
-  if (name_ == &::google::protobuf::internal::kEmptyString) {
+  if (name_ == &::google::protobuf::internal::GetEmptyString()) {
     name_ = new ::std::string;
   }
   name_->assign(reinterpret_cast<const char*>(value), size);
 }
 inline ::std::string* MethodDescriptorProto::mutable_name() {
   set_has_name();
-  if (name_ == &::google::protobuf::internal::kEmptyString) {
+  if (name_ == &::google::protobuf::internal::GetEmptyString()) {
     name_ = new ::std::string;
   }
   return name_;
 }
 inline ::std::string* MethodDescriptorProto::release_name() {
   clear_has_name();
-  if (name_ == &::google::protobuf::internal::kEmptyString) {
+  if (name_ == &::google::protobuf::internal::GetEmptyString()) {
     return NULL;
   } else {
     ::std::string* temp = name_;
-    name_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+    name_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
     return temp;
   }
 }
 inline void MethodDescriptorProto::set_allocated_name(::std::string* name) {
-  if (name_ != &::google::protobuf::internal::kEmptyString) {
+  if (name_ != &::google::protobuf::internal::GetEmptyString()) {
     delete name_;
   }
   if (name) {
@@ -4367,7 +4367,7 @@ inline void MethodDescriptorProto::set_allocated_name(::std::string* name) {
     name_ = name;
   } else {
     clear_has_name();
-    name_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+    name_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
   }
 }
 
@@ -4382,7 +4382,7 @@ inline void MethodDescriptorProto::clear_has_input_type() {
   _has_bits_[0] &= ~0x00000002u;
 }
 inline void MethodDescriptorProto::clear_input_type() {
-  if (input_type_ != &::google::protobuf::internal::kEmptyString) {
+  if (input_type_ != &::google::protobuf::internal::GetEmptyString()) {
     input_type_->clear();
   }
   clear_has_input_type();
@@ -4392,44 +4392,44 @@ inline const ::std::string& MethodDescriptorProto::input_type() const {
 }
 inline void MethodDescriptorProto::set_input_type(const ::std::string& value) {
   set_has_input_type();
-  if (input_type_ == &::google::protobuf::internal::kEmptyString) {
+  if (input_type_ == &::google::protobuf::internal::GetEmptyString()) {
     input_type_ = new ::std::string;
   }
   input_type_->assign(value);
 }
 inline void MethodDescriptorProto::set_input_type(const char* value) {
   set_has_input_type();
-  if (input_type_ == &::google::protobuf::internal::kEmptyString) {
+  if (input_type_ == &::google::protobuf::internal::GetEmptyString()) {
     input_type_ = new ::std::string;
   }
   input_type_->assign(value);
 }
 inline void MethodDescriptorProto::set_input_type(const char* value, size_t size) {
   set_has_input_type();
-  if (input_type_ == &::google::protobuf::internal::kEmptyString) {
+  if (input_type_ == &::google::protobuf::internal::GetEmptyString()) {
     input_type_ = new ::std::string;
   }
   input_type_->assign(reinterpret_cast<const char*>(value), size);
 }
 inline ::std::string* MethodDescriptorProto::mutable_input_type() {
   set_has_input_type();
-  if (input_type_ == &::google::protobuf::internal::kEmptyString) {
+  if (input_type_ == &::google::protobuf::internal::GetEmptyString()) {
     input_type_ = new ::std::string;
   }
   return input_type_;
 }
 inline ::std::string* MethodDescriptorProto::release_input_type() {
   clear_has_input_type();
-  if (input_type_ == &::google::protobuf::internal::kEmptyString) {
+  if (input_type_ == &::google::protobuf::internal::GetEmptyString()) {
     return NULL;
   } else {
     ::std::string* temp = input_type_;
-    input_type_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+    input_type_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
     return temp;
   }
 }
 inline void MethodDescriptorProto::set_allocated_input_type(::std::string* input_type) {
-  if (input_type_ != &::google::protobuf::internal::kEmptyString) {
+  if (input_type_ != &::google::protobuf::internal::GetEmptyString()) {
     delete input_type_;
   }
   if (input_type) {
@@ -4437,7 +4437,7 @@ inline void MethodDescriptorProto::set_allocated_input_type(::std::string* input
     input_type_ = input_type;
   } else {
     clear_has_input_type();
-    input_type_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+    input_type_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
   }
 }
 
@@ -4452,7 +4452,7 @@ inline void MethodDescriptorProto::clear_has_output_type() {
   _has_bits_[0] &= ~0x00000004u;
 }
 inline void MethodDescriptorProto::clear_output_type() {
-  if (output_type_ != &::google::protobuf::internal::kEmptyString) {
+  if (output_type_ != &::google::protobuf::internal::GetEmptyString()) {
     output_type_->clear();
   }
   clear_has_output_type();
@@ -4462,44 +4462,44 @@ inline const ::std::string& MethodDescriptorProto::output_type() const {
 }
 inline void MethodDescriptorProto::set_output_type(const ::std::string& value) {
   set_has_output_type();
-  if (output_type_ == &::google::protobuf::internal::kEmptyString) {
+  if (output_type_ == &::google::protobuf::internal::GetEmptyString()) {
     output_type_ = new ::std::string;
   }
   output_type_->assign(value);
 }
 inline void MethodDescriptorProto::set_output_type(const char* value) {
   set_has_output_type();
-  if (output_type_ == &::google::protobuf::internal::kEmptyString) {
+  if (output_type_ == &::google::protobuf::internal::GetEmptyString()) {
     output_type_ = new ::std::string;
   }
   output_type_->assign(value);
 }
 inline void MethodDescriptorProto::set_output_type(const char* value, size_t size) {
   set_has_output_type();
-  if (output_type_ == &::google::protobuf::internal::kEmptyString) {
+  if (output_type_ == &::google::protobuf::internal::GetEmptyString()) {
     output_type_ = new ::std::string;
   }
   output_type_->assign(reinterpret_cast<const char*>(value), size);
 }
 inline ::std::string* MethodDescriptorProto::mutable_output_type() {
   set_has_output_type();
-  if (output_type_ == &::google::protobuf::internal::kEmptyString) {
+  if (output_type_ == &::google::protobuf::internal::GetEmptyString()) {
     output_type_ = new ::std::string;
   }
   return output_type_;
 }
 inline ::std::string* MethodDescriptorProto::release_output_type() {
   clear_has_output_type();
-  if (output_type_ == &::google::protobuf::internal::kEmptyString) {
+  if (output_type_ == &::google::protobuf::internal::GetEmptyString()) {
     return NULL;
   } else {
     ::std::string* temp = output_type_;
-    output_type_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+    output_type_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
     return temp;
   }
 }
 inline void MethodDescriptorProto::set_allocated_output_type(::std::string* output_type) {
-  if (output_type_ != &::google::protobuf::internal::kEmptyString) {
+  if (output_type_ != &::google::protobuf::internal::GetEmptyString()) {
     delete output_type_;
   }
   if (output_type) {
@@ -4507,7 +4507,7 @@ inline void MethodDescriptorProto::set_allocated_output_type(::std::string* outp
     output_type_ = output_type;
   } else {
     clear_has_output_type();
-    output_type_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+    output_type_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
   }
 }
 
@@ -4564,7 +4564,7 @@ inline void FileOptions::clear_has_java_package() {
   _has_bits_[0] &= ~0x00000001u;
 }
 inline void FileOptions::clear_java_package() {
-  if (java_package_ != &::google::protobuf::internal::kEmptyString) {
+  if (java_package_ != &::google::protobuf::internal::GetEmptyString()) {
     java_package_->clear();
   }
   clear_has_java_package();
@@ -4574,44 +4574,44 @@ inline const ::std::string& FileOptions::java_package() const {
 }
 inline void FileOptions::set_java_package(const ::std::string& value) {
   set_has_java_package();
-  if (java_package_ == &::google::protobuf::internal::kEmptyString) {
+  if (java_package_ == &::google::protobuf::internal::GetEmptyString()) {
     java_package_ = new ::std::string;
   }
   java_package_->assign(value);
 }
 inline void FileOptions::set_java_package(const char* value) {
   set_has_java_package();
-  if (java_package_ == &::google::protobuf::internal::kEmptyString) {
+  if (java_package_ == &::google::protobuf::internal::GetEmptyString()) {
     java_package_ = new ::std::string;
   }
   java_package_->assign(value);
 }
 inline void FileOptions::set_java_package(const char* value, size_t size) {
   set_has_java_package();
-  if (java_package_ == &::google::protobuf::internal::kEmptyString) {
+  if (java_package_ == &::google::protobuf::internal::GetEmptyString()) {
     java_package_ = new ::std::string;
   }
   java_package_->assign(reinterpret_cast<const char*>(value), size);
 }
 inline ::std::string* FileOptions::mutable_java_package() {
   set_has_java_package();
-  if (java_package_ == &::google::protobuf::internal::kEmptyString) {
+  if (java_package_ == &::google::protobuf::internal::GetEmptyString()) {
     java_package_ = new ::std::string;
   }
   return java_package_;
 }
 inline ::std::string* FileOptions::release_java_package() {
   clear_has_java_package();
-  if (java_package_ == &::google::protobuf::internal::kEmptyString) {
+  if (java_package_ == &::google::protobuf::internal::GetEmptyString()) {
     return NULL;
   } else {
     ::std::string* temp = java_package_;
-    java_package_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+    java_package_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
     return temp;
   }
 }
 inline void FileOptions::set_allocated_java_package(::std::string* java_package) {
-  if (java_package_ != &::google::protobuf::internal::kEmptyString) {
+  if (java_package_ != &::google::protobuf::internal::GetEmptyString()) {
     delete java_package_;
   }
   if (java_package) {
@@ -4619,7 +4619,7 @@ inline void FileOptions::set_allocated_java_package(::std::string* java_package)
     java_package_ = java_package;
   } else {
     clear_has_java_package();
-    java_package_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+    java_package_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
   }
 }
 
@@ -4634,7 +4634,7 @@ inline void FileOptions::clear_has_java_outer_classname() {
   _has_bits_[0] &= ~0x00000002u;
 }
 inline void FileOptions::clear_java_outer_classname() {
-  if (java_outer_classname_ != &::google::protobuf::internal::kEmptyString) {
+  if (java_outer_classname_ != &::google::protobuf::internal::GetEmptyString()) {
     java_outer_classname_->clear();
   }
   clear_has_java_outer_classname();
@@ -4644,44 +4644,44 @@ inline const ::std::string& FileOptions::java_outer_classname() const {
 }
 inline void FileOptions::set_java_outer_classname(const ::std::string& value) {
   set_has_java_outer_classname();
-  if (java_outer_classname_ == &::google::protobuf::internal::kEmptyString) {
+  if (java_outer_classname_ == &::google::protobuf::internal::GetEmptyString()) {
     java_outer_classname_ = new ::std::string;
   }
   java_outer_classname_->assign(value);
 }
 inline void FileOptions::set_java_outer_classname(const char* value) {
   set_has_java_outer_classname();
-  if (java_outer_classname_ == &::google::protobuf::internal::kEmptyString) {
+  if (java_outer_classname_ == &::google::protobuf::internal::GetEmptyString()) {
     java_outer_classname_ = new ::std::string;
   }
   java_outer_classname_->assign(value);
 }
 inline void FileOptions::set_java_outer_classname(const char* value, size_t size) {
   set_has_java_outer_classname();
-  if (java_outer_classname_ == &::google::protobuf::internal::kEmptyString) {
+  if (java_outer_classname_ == &::google::protobuf::internal::GetEmptyString()) {
     java_outer_classname_ = new ::std::string;
   }
   java_outer_classname_->assign(reinterpret_cast<const char*>(value), size);
 }
 inline ::std::string* FileOptions::mutable_java_outer_classname() {
   set_has_java_outer_classname();
-  if (java_outer_classname_ == &::google::protobuf::internal::kEmptyString) {
+  if (java_outer_classname_ == &::google::protobuf::internal::GetEmptyString()) {
     java_outer_classname_ = new ::std::string;
   }
   return java_outer_classname_;
 }
 inline ::std::string* FileOptions::release_java_outer_classname() {
   clear_has_java_outer_classname();
-  if (java_outer_classname_ == &::google::protobuf::internal::kEmptyString) {
+  if (java_outer_classname_ == &::google::protobuf::internal::GetEmptyString()) {
     return NULL;
   } else {
     ::std::string* temp = java_outer_classname_;
-    java_outer_classname_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+    java_outer_classname_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
     return temp;
   }
 }
 inline void FileOptions::set_allocated_java_outer_classname(::std::string* java_outer_classname) {
-  if (java_outer_classname_ != &::google::protobuf::internal::kEmptyString) {
+  if (java_outer_classname_ != &::google::protobuf::internal::GetEmptyString()) {
     delete java_outer_classname_;
   }
   if (java_outer_classname) {
@@ -4689,7 +4689,7 @@ inline void FileOptions::set_allocated_java_outer_classname(::std::string* java_
     java_outer_classname_ = java_outer_classname;
   } else {
     clear_has_java_outer_classname();
-    java_outer_classname_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+    java_outer_classname_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
   }
 }
 
@@ -4793,7 +4793,7 @@ inline void FileOptions::clear_has_go_package() {
   _has_bits_[0] &= ~0x00000040u;
 }
 inline void FileOptions::clear_go_package() {
-  if (go_package_ != &::google::protobuf::internal::kEmptyString) {
+  if (go_package_ != &::google::protobuf::internal::GetEmptyString()) {
     go_package_->clear();
   }
   clear_has_go_package();
@@ -4803,44 +4803,44 @@ inline const ::std::string& FileOptions::go_package() const {
 }
 inline void FileOptions::set_go_package(const ::std::string& value) {
   set_has_go_package();
-  if (go_package_ == &::google::protobuf::internal::kEmptyString) {
+  if (go_package_ == &::google::protobuf::internal::GetEmptyString()) {
     go_package_ = new ::std::string;
   }
   go_package_->assign(value);
 }
 inline void FileOptions::set_go_package(const char* value) {
   set_has_go_package();
-  if (go_package_ == &::google::protobuf::internal::kEmptyString) {
+  if (go_package_ == &::google::protobuf::internal::GetEmptyString()) {
     go_package_ = new ::std::string;
   }
   go_package_->assign(value);
 }
 inline void FileOptions::set_go_package(const char* value, size_t size) {
   set_has_go_package();
-  if (go_package_ == &::google::protobuf::internal::kEmptyString) {
+  if (go_package_ == &::google::protobuf::internal::GetEmptyString()) {
     go_package_ = new ::std::string;
   }
   go_package_->assign(reinterpret_cast<const char*>(value), size);
 }
 inline ::std::string* FileOptions::mutable_go_package() {
   set_has_go_package();
-  if (go_package_ == &::google::protobuf::internal::kEmptyString) {
+  if (go_package_ == &::google::protobuf::internal::GetEmptyString()) {
     go_package_ = new ::std::string;
   }
   return go_package_;
 }
 inline ::std::string* FileOptions::release_go_package() {
   clear_has_go_package();
-  if (go_package_ == &::google::protobuf::internal::kEmptyString) {
+  if (go_package_ == &::google::protobuf::internal::GetEmptyString()) {
     return NULL;
   } else {
     ::std::string* temp = go_package_;
-    go_package_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+    go_package_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
     return temp;
   }
 }
 inline void FileOptions::set_allocated_go_package(::std::string* go_package) {
-  if (go_package_ != &::google::protobuf::internal::kEmptyString) {
+  if (go_package_ != &::google::protobuf::internal::GetEmptyString()) {
     delete go_package_;
   }
   if (go_package) {
@@ -4848,7 +4848,7 @@ inline void FileOptions::set_allocated_go_package(::std::string* go_package) {
     go_package_ = go_package;
   } else {
     clear_has_go_package();
-    go_package_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+    go_package_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
   }
 }
 
@@ -5120,7 +5120,7 @@ inline void FieldOptions::clear_has_experimental_map_key() {
   _has_bits_[0] &= ~0x00000010u;
 }
 inline void FieldOptions::clear_experimental_map_key() {
-  if (experimental_map_key_ != &::google::protobuf::internal::kEmptyString) {
+  if (experimental_map_key_ != &::google::protobuf::internal::GetEmptyString()) {
     experimental_map_key_->clear();
   }
   clear_has_experimental_map_key();
@@ -5130,44 +5130,44 @@ inline const ::std::string& FieldOptions::experimental_map_key() const {
 }
 inline void FieldOptions::set_experimental_map_key(const ::std::string& value) {
   set_has_experimental_map_key();
-  if (experimental_map_key_ == &::google::protobuf::internal::kEmptyString) {
+  if (experimental_map_key_ == &::google::protobuf::internal::GetEmptyString()) {
     experimental_map_key_ = new ::std::string;
   }
   experimental_map_key_->assign(value);
 }
 inline void FieldOptions::set_experimental_map_key(const char* value) {
   set_has_experimental_map_key();
-  if (experimental_map_key_ == &::google::protobuf::internal::kEmptyString) {
+  if (experimental_map_key_ == &::google::protobuf::internal::GetEmptyString()) {
     experimental_map_key_ = new ::std::string;
   }
   experimental_map_key_->assign(value);
 }
 inline void FieldOptions::set_experimental_map_key(const char* value, size_t size) {
   set_has_experimental_map_key();
-  if (experimental_map_key_ == &::google::protobuf::internal::kEmptyString) {
+  if (experimental_map_key_ == &::google::protobuf::internal::GetEmptyString()) {
     experimental_map_key_ = new ::std::string;
   }
   experimental_map_key_->assign(reinterpret_cast<const char*>(value), size);
 }
 inline ::std::string* FieldOptions::mutable_experimental_map_key() {
   set_has_experimental_map_key();
-  if (experimental_map_key_ == &::google::protobuf::internal::kEmptyString) {
+  if (experimental_map_key_ == &::google::protobuf::internal::GetEmptyString()) {
     experimental_map_key_ = new ::std::string;
   }
   return experimental_map_key_;
 }
 inline ::std::string* FieldOptions::release_experimental_map_key() {
   clear_has_experimental_map_key();
-  if (experimental_map_key_ == &::google::protobuf::internal::kEmptyString) {
+  if (experimental_map_key_ == &::google::protobuf::internal::GetEmptyString()) {
     return NULL;
   } else {
     ::std::string* temp = experimental_map_key_;
-    experimental_map_key_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+    experimental_map_key_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
     return temp;
   }
 }
 inline void FieldOptions::set_allocated_experimental_map_key(::std::string* experimental_map_key) {
-  if (experimental_map_key_ != &::google::protobuf::internal::kEmptyString) {
+  if (experimental_map_key_ != &::google::protobuf::internal::GetEmptyString()) {
     delete experimental_map_key_;
   }
   if (experimental_map_key) {
@@ -5175,7 +5175,7 @@ inline void FieldOptions::set_allocated_experimental_map_key(::std::string* expe
     experimental_map_key_ = experimental_map_key;
   } else {
     clear_has_experimental_map_key();
-    experimental_map_key_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+    experimental_map_key_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
   }
 }
 
@@ -5379,7 +5379,7 @@ inline void UninterpretedOption_NamePart::clear_has_name_part() {
   _has_bits_[0] &= ~0x00000001u;
 }
 inline void UninterpretedOption_NamePart::clear_name_part() {
-  if (name_part_ != &::google::protobuf::internal::kEmptyString) {
+  if (name_part_ != &::google::protobuf::internal::GetEmptyString()) {
     name_part_->clear();
   }
   clear_has_name_part();
@@ -5389,44 +5389,44 @@ inline const ::std::string& UninterpretedOption_NamePart::name_part() const {
 }
 inline void UninterpretedOption_NamePart::set_name_part(const ::std::string& value) {
   set_has_name_part();
-  if (name_part_ == &::google::protobuf::internal::kEmptyString) {
+  if (name_part_ == &::google::protobuf::internal::GetEmptyString()) {
     name_part_ = new ::std::string;
   }
   name_part_->assign(value);
 }
 inline void UninterpretedOption_NamePart::set_name_part(const char* value) {
   set_has_name_part();
-  if (name_part_ == &::google::protobuf::internal::kEmptyString) {
+  if (name_part_ == &::google::protobuf::internal::GetEmptyString()) {
     name_part_ = new ::std::string;
   }
   name_part_->assign(value);
 }
 inline void UninterpretedOption_NamePart::set_name_part(const char* value, size_t size) {
   set_has_name_part();
-  if (name_part_ == &::google::protobuf::internal::kEmptyString) {
+  if (name_part_ == &::google::protobuf::internal::GetEmptyString()) {
     name_part_ = new ::std::string;
   }
   name_part_->assign(reinterpret_cast<const char*>(value), size);
 }
 inline ::std::string* UninterpretedOption_NamePart::mutable_name_part() {
   set_has_name_part();
-  if (name_part_ == &::google::protobuf::internal::kEmptyString) {
+  if (name_part_ == &::google::protobuf::internal::GetEmptyString()) {
     name_part_ = new ::std::string;
   }
   return name_part_;
 }
 inline ::std::string* UninterpretedOption_NamePart::release_name_part() {
   clear_has_name_part();
-  if (name_part_ == &::google::protobuf::internal::kEmptyString) {
+  if (name_part_ == &::google::protobuf::internal::GetEmptyString()) {
     return NULL;
   } else {
     ::std::string* temp = name_part_;
-    name_part_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+    name_part_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
     return temp;
   }
 }
 inline void UninterpretedOption_NamePart::set_allocated_name_part(::std::string* name_part) {
-  if (name_part_ != &::google::protobuf::internal::kEmptyString) {
+  if (name_part_ != &::google::protobuf::internal::GetEmptyString()) {
     delete name_part_;
   }
   if (name_part) {
@@ -5434,7 +5434,7 @@ inline void UninterpretedOption_NamePart::set_allocated_name_part(::std::string*
     name_part_ = name_part;
   } else {
     clear_has_name_part();
-    name_part_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+    name_part_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
   }
 }
 
@@ -5500,7 +5500,7 @@ inline void UninterpretedOption::clear_has_identifier_value() {
   _has_bits_[0] &= ~0x00000002u;
 }
 inline void UninterpretedOption::clear_identifier_value() {
-  if (identifier_value_ != &::google::protobuf::internal::kEmptyString) {
+  if (identifier_value_ != &::google::protobuf::internal::GetEmptyString()) {
     identifier_value_->clear();
   }
   clear_has_identifier_value();
@@ -5510,44 +5510,44 @@ inline const ::std::string& UninterpretedOption::identifier_value() const {
 }
 inline void UninterpretedOption::set_identifier_value(const ::std::string& value) {
   set_has_identifier_value();
-  if (identifier_value_ == &::google::protobuf::internal::kEmptyString) {
+  if (identifier_value_ == &::google::protobuf::internal::GetEmptyString()) {
     identifier_value_ = new ::std::string;
   }
   identifier_value_->assign(value);
 }
 inline void UninterpretedOption::set_identifier_value(const char* value) {
   set_has_identifier_value();
-  if (identifier_value_ == &::google::protobuf::internal::kEmptyString) {
+  if (identifier_value_ == &::google::protobuf::internal::GetEmptyString()) {
     identifier_value_ = new ::std::string;
   }
   identifier_value_->assign(value);
 }
 inline void UninterpretedOption::set_identifier_value(const char* value, size_t size) {
   set_has_identifier_value();
-  if (identifier_value_ == &::google::protobuf::internal::kEmptyString) {
+  if (identifier_value_ == &::google::protobuf::internal::GetEmptyString()) {
     identifier_value_ = new ::std::string;
   }
   identifier_value_->assign(reinterpret_cast<const char*>(value), size);
 }
 inline ::std::string* UninterpretedOption::mutable_identifier_value() {
   set_has_identifier_value();
-  if (identifier_value_ == &::google::protobuf::internal::kEmptyString) {
+  if (identifier_value_ == &::google::protobuf::internal::GetEmptyString()) {
     identifier_value_ = new ::std::string;
   }
   return identifier_value_;
 }
 inline ::std::string* UninterpretedOption::release_identifier_value() {
   clear_has_identifier_value();
-  if (identifier_value_ == &::google::protobuf::internal::kEmptyString) {
+  if (identifier_value_ == &::google::protobuf::internal::GetEmptyString()) {
     return NULL;
   } else {
     ::std::string* temp = identifier_value_;
-    identifier_value_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+    identifier_value_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
     return temp;
   }
 }
 inline void UninterpretedOption::set_allocated_identifier_value(::std::string* identifier_value) {
-  if (identifier_value_ != &::google::protobuf::internal::kEmptyString) {
+  if (identifier_value_ != &::google::protobuf::internal::GetEmptyString()) {
     delete identifier_value_;
   }
   if (identifier_value) {
@@ -5555,7 +5555,7 @@ inline void UninterpretedOption::set_allocated_identifier_value(::std::string* i
     identifier_value_ = identifier_value;
   } else {
     clear_has_identifier_value();
-    identifier_value_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+    identifier_value_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
   }
 }
 
@@ -5636,7 +5636,7 @@ inline void UninterpretedOption::clear_has_string_value() {
   _has_bits_[0] &= ~0x00000020u;
 }
 inline void UninterpretedOption::clear_string_value() {
-  if (string_value_ != &::google::protobuf::internal::kEmptyString) {
+  if (string_value_ != &::google::protobuf::internal::GetEmptyString()) {
     string_value_->clear();
   }
   clear_has_string_value();
@@ -5646,44 +5646,44 @@ inline const ::std::string& UninterpretedOption::string_value() const {
 }
 inline void UninterpretedOption::set_string_value(const ::std::string& value) {
   set_has_string_value();
-  if (string_value_ == &::google::protobuf::internal::kEmptyString) {
+  if (string_value_ == &::google::protobuf::internal::GetEmptyString()) {
     string_value_ = new ::std::string;
   }
   string_value_->assign(value);
 }
 inline void UninterpretedOption::set_string_value(const char* value) {
   set_has_string_value();
-  if (string_value_ == &::google::protobuf::internal::kEmptyString) {
+  if (string_value_ == &::google::protobuf::internal::GetEmptyString()) {
     string_value_ = new ::std::string;
   }
   string_value_->assign(value);
 }
 inline void UninterpretedOption::set_string_value(const void* value, size_t size) {
   set_has_string_value();
-  if (string_value_ == &::google::protobuf::internal::kEmptyString) {
+  if (string_value_ == &::google::protobuf::internal::GetEmptyString()) {
     string_value_ = new ::std::string;
   }
   string_value_->assign(reinterpret_cast<const char*>(value), size);
 }
 inline ::std::string* UninterpretedOption::mutable_string_value() {
   set_has_string_value();
-  if (string_value_ == &::google::protobuf::internal::kEmptyString) {
+  if (string_value_ == &::google::protobuf::internal::GetEmptyString()) {
     string_value_ = new ::std::string;
   }
   return string_value_;
 }
 inline ::std::string* UninterpretedOption::release_string_value() {
   clear_has_string_value();
-  if (string_value_ == &::google::protobuf::internal::kEmptyString) {
+  if (string_value_ == &::google::protobuf::internal::GetEmptyString()) {
     return NULL;
   } else {
     ::std::string* temp = string_value_;
-    string_value_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+    string_value_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
     return temp;
   }
 }
 inline void UninterpretedOption::set_allocated_string_value(::std::string* string_value) {
-  if (string_value_ != &::google::protobuf::internal::kEmptyString) {
+  if (string_value_ != &::google::protobuf::internal::GetEmptyString()) {
     delete string_value_;
   }
   if (string_value) {
@@ -5691,7 +5691,7 @@ inline void UninterpretedOption::set_allocated_string_value(::std::string* strin
     string_value_ = string_value;
   } else {
     clear_has_string_value();
-    string_value_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+    string_value_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
   }
 }
 
@@ -5706,7 +5706,7 @@ inline void UninterpretedOption::clear_has_aggregate_value() {
   _has_bits_[0] &= ~0x00000040u;
 }
 inline void UninterpretedOption::clear_aggregate_value() {
-  if (aggregate_value_ != &::google::protobuf::internal::kEmptyString) {
+  if (aggregate_value_ != &::google::protobuf::internal::GetEmptyString()) {
     aggregate_value_->clear();
   }
   clear_has_aggregate_value();
@@ -5716,44 +5716,44 @@ inline const ::std::string& UninterpretedOption::aggregate_value() const {
 }
 inline void UninterpretedOption::set_aggregate_value(const ::std::string& value) {
   set_has_aggregate_value();
-  if (aggregate_value_ == &::google::protobuf::internal::kEmptyString) {
+  if (aggregate_value_ == &::google::protobuf::internal::GetEmptyString()) {
     aggregate_value_ = new ::std::string;
   }
   aggregate_value_->assign(value);
 }
 inline void UninterpretedOption::set_aggregate_value(const char* value) {
   set_has_aggregate_value();
-  if (aggregate_value_ == &::google::protobuf::internal::kEmptyString) {
+  if (aggregate_value_ == &::google::protobuf::internal::GetEmptyString()) {
     aggregate_value_ = new ::std::string;
   }
   aggregate_value_->assign(value);
 }
 inline void UninterpretedOption::set_aggregate_value(const char* value, size_t size) {
   set_has_aggregate_value();
-  if (aggregate_value_ == &::google::protobuf::internal::kEmptyString) {
+  if (aggregate_value_ == &::google::protobuf::internal::GetEmptyString()) {
     aggregate_value_ = new ::std::string;
   }
   aggregate_value_->assign(reinterpret_cast<const char*>(value), size);
 }
 inline ::std::string* UninterpretedOption::mutable_aggregate_value() {
   set_has_aggregate_value();
-  if (aggregate_value_ == &::google::protobuf::internal::kEmptyString) {
+  if (aggregate_value_ == &::google::protobuf::internal::GetEmptyString()) {
     aggregate_value_ = new ::std::string;
   }
   return aggregate_value_;
 }
 inline ::std::string* UninterpretedOption::release_aggregate_value() {
   clear_has_aggregate_value();
-  if (aggregate_value_ == &::google::protobuf::internal::kEmptyString) {
+  if (aggregate_value_ == &::google::protobuf::internal::GetEmptyString()) {
     return NULL;
   } else {
     ::std::string* temp = aggregate_value_;
-    aggregate_value_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+    aggregate_value_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
     return temp;
   }
 }
 inline void UninterpretedOption::set_allocated_aggregate_value(::std::string* aggregate_value) {
-  if (aggregate_value_ != &::google::protobuf::internal::kEmptyString) {
+  if (aggregate_value_ != &::google::protobuf::internal::GetEmptyString()) {
     delete aggregate_value_;
   }
   if (aggregate_value) {
@@ -5761,7 +5761,7 @@ inline void UninterpretedOption::set_allocated_aggregate_value(::std::string* ag
     aggregate_value_ = aggregate_value;
   } else {
     clear_has_aggregate_value();
-    aggregate_value_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+    aggregate_value_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
   }
 }
 
@@ -5830,7 +5830,7 @@ inline void SourceCodeInfo_Location::clear_has_leading_comments() {
   _has_bits_[0] &= ~0x00000004u;
 }
 inline void SourceCodeInfo_Location::clear_leading_comments() {
-  if (leading_comments_ != &::google::protobuf::internal::kEmptyString) {
+  if (leading_comments_ != &::google::protobuf::internal::GetEmptyString()) {
     leading_comments_->clear();
   }
   clear_has_leading_comments();
@@ -5840,44 +5840,44 @@ inline const ::std::string& SourceCodeInfo_Location::leading_comments() const {
 }
 inline void SourceCodeInfo_Location::set_leading_comments(const ::std::string& value) {
   set_has_leading_comments();
-  if (leading_comments_ == &::google::protobuf::internal::kEmptyString) {
+  if (leading_comments_ == &::google::protobuf::internal::GetEmptyString()) {
     leading_comments_ = new ::std::string;
   }
   leading_comments_->assign(value);
 }
 inline void SourceCodeInfo_Location::set_leading_comments(const char* value) {
   set_has_leading_comments();
-  if (leading_comments_ == &::google::protobuf::internal::kEmptyString) {
+  if (leading_comments_ == &::google::protobuf::internal::GetEmptyString()) {
     leading_comments_ = new ::std::string;
   }
   leading_comments_->assign(value);
 }
 inline void SourceCodeInfo_Location::set_leading_comments(const char* value, size_t size) {
   set_has_leading_comments();
-  if (leading_comments_ == &::google::protobuf::internal::kEmptyString) {
+  if (leading_comments_ == &::google::protobuf::internal::GetEmptyString()) {
     leading_comments_ = new ::std::string;
   }
   leading_comments_->assign(reinterpret_cast<const char*>(value), size);
 }
 inline ::std::string* SourceCodeInfo_Location::mutable_leading_comments() {
   set_has_leading_comments();
-  if (leading_comments_ == &::google::protobuf::internal::kEmptyString) {
+  if (leading_comments_ == &::google::protobuf::internal::GetEmptyString()) {
     leading_comments_ = new ::std::string;
   }
   return leading_comments_;
 }
 inline ::std::string* SourceCodeInfo_Location::release_leading_comments() {
   clear_has_leading_comments();
-  if (leading_comments_ == &::google::protobuf::internal::kEmptyString) {
+  if (leading_comments_ == &::google::protobuf::internal::GetEmptyString()) {
     return NULL;
   } else {
     ::std::string* temp = leading_comments_;
-    leading_comments_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+    leading_comments_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
     return temp;
   }
 }
 inline void SourceCodeInfo_Location::set_allocated_leading_comments(::std::string* leading_comments) {
-  if (leading_comments_ != &::google::protobuf::internal::kEmptyString) {
+  if (leading_comments_ != &::google::protobuf::internal::GetEmptyString()) {
     delete leading_comments_;
   }
   if (leading_comments) {
@@ -5885,7 +5885,7 @@ inline void SourceCodeInfo_Location::set_allocated_leading_comments(::std::strin
     leading_comments_ = leading_comments;
   } else {
     clear_has_leading_comments();
-    leading_comments_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+    leading_comments_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
   }
 }
 
@@ -5900,7 +5900,7 @@ inline void SourceCodeInfo_Location::clear_has_trailing_comments() {
   _has_bits_[0] &= ~0x00000008u;
 }
 inline void SourceCodeInfo_Location::clear_trailing_comments() {
-  if (trailing_comments_ != &::google::protobuf::internal::kEmptyString) {
+  if (trailing_comments_ != &::google::protobuf::internal::GetEmptyString()) {
     trailing_comments_->clear();
   }
   clear_has_trailing_comments();
@@ -5910,44 +5910,44 @@ inline const ::std::string& SourceCodeInfo_Location::trailing_comments() const {
 }
 inline void SourceCodeInfo_Location::set_trailing_comments(const ::std::string& value) {
   set_has_trailing_comments();
-  if (trailing_comments_ == &::google::protobuf::internal::kEmptyString) {
+  if (trailing_comments_ == &::google::protobuf::internal::GetEmptyString()) {
     trailing_comments_ = new ::std::string;
   }
   trailing_comments_->assign(value);
 }
 inline void SourceCodeInfo_Location::set_trailing_comments(const char* value) {
   set_has_trailing_comments();
-  if (trailing_comments_ == &::google::protobuf::internal::kEmptyString) {
+  if (trailing_comments_ == &::google::protobuf::internal::GetEmptyString()) {
     trailing_comments_ = new ::std::string;
   }
   trailing_comments_->assign(value);
 }
 inline void SourceCodeInfo_Location::set_trailing_comments(const char* value, size_t size) {
   set_has_trailing_comments();
-  if (trailing_comments_ == &::google::protobuf::internal::kEmptyString) {
+  if (trailing_comments_ == &::google::protobuf::internal::GetEmptyString()) {
     trailing_comments_ = new ::std::string;
   }
   trailing_comments_->assign(reinterpret_cast<const char*>(value), size);
 }
 inline ::std::string* SourceCodeInfo_Location::mutable_trailing_comments() {
   set_has_trailing_comments();
-  if (trailing_comments_ == &::google::protobuf::internal::kEmptyString) {
+  if (trailing_comments_ == &::google::protobuf::internal::GetEmptyString()) {
     trailing_comments_ = new ::std::string;
   }
   return trailing_comments_;
 }
 inline ::std::string* SourceCodeInfo_Location::release_trailing_comments() {
   clear_has_trailing_comments();
-  if (trailing_comments_ == &::google::protobuf::internal::kEmptyString) {
+  if (trailing_comments_ == &::google::protobuf::internal::GetEmptyString()) {
     return NULL;
   } else {
     ::std::string* temp = trailing_comments_;
-    trailing_comments_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+    trailing_comments_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
     return temp;
   }
 }
 inline void SourceCodeInfo_Location::set_allocated_trailing_comments(::std::string* trailing_comments) {
-  if (trailing_comments_ != &::google::protobuf::internal::kEmptyString) {
+  if (trailing_comments_ != &::google::protobuf::internal::GetEmptyString()) {
     delete trailing_comments_;
   }
   if (trailing_comments) {
@@ -5955,7 +5955,7 @@ inline void SourceCodeInfo_Location::set_allocated_trailing_comments(::std::stri
     trailing_comments_ = trailing_comments;
   } else {
     clear_has_trailing_comments();
-    trailing_comments_ = const_cast< ::std::string*>(&::google::protobuf::internal::kEmptyString);
+    trailing_comments_ = const_cast< ::std::string*>(&::google::protobuf::internal::GetEmptyString());
   }
 }
 
diff --git a/third_party/protobuf/src/google/protobuf/generated_message_reflection.cc b/third_party/protobuf/src/google/protobuf/generated_message_reflection.cc
index 09b0699..56d6b29 100644
--- a/third_party/protobuf/src/google/protobuf/generated_message_reflection.cc
+++ b/third_party/protobuf/src/google/protobuf/generated_message_reflection.cc
@@ -56,7 +56,7 @@ bool ParseNamedEnum(const EnumDescriptor* descriptor,
 
 const string& NameOfEnum(const EnumDescriptor* descriptor, int value) {
   const EnumValueDescriptor* d = descriptor->FindValueByNumber(value);
-  return (d == NULL ? kEmptyString : d->name());
+  return (d == NULL ? GetEmptyString() : d->name());
 }
 
 // ===================================================================
@@ -759,7 +759,7 @@ string GeneratedMessageReflection::GetString(
     }
 
     GOOGLE_LOG(FATAL) << "Can't get here.";
-    return kEmptyString;  // Make compiler happy.
+    return GetEmptyString();  // Make compiler happy.
   }
 }
 
@@ -778,7 +778,7 @@ const string& GeneratedMessageReflection::GetStringReference(
     }
 
     GOOGLE_LOG(FATAL) << "Can't get here.";
-    return kEmptyString;  // Make compiler happy.
+    return GetEmptyString();  // Make compiler happy.
   }
 }
 
@@ -820,7 +820,7 @@ string GeneratedMessageReflection::GetRepeatedString(
     }
 
     GOOGLE_LOG(FATAL) << "Can't get here.";
-    return kEmptyString;  // Make compiler happy.
+    return GetEmptyString();  // Make compiler happy.
   }
 }
 
@@ -838,7 +838,7 @@ const string& GeneratedMessageReflection::GetRepeatedStringReference(
     }
 
     GOOGLE_LOG(FATAL) << "Can't get here.";
-    return kEmptyString;  // Make compiler happy.
+    return GetEmptyString();  // Make compiler happy.
   }
 }
 
diff --git a/third_party/protobuf/src/google/protobuf/generated_message_util.cc b/third_party/protobuf/src/google/protobuf/generated_message_util.cc
index ac32150..794be35 100644
--- a/third_party/protobuf/src/google/protobuf/generated_message_util.cc
+++ b/third_party/protobuf/src/google/protobuf/generated_message_util.cc
@@ -47,7 +47,12 @@ double NaN() {
   return std::numeric_limits<double>::quiet_NaN();
 }
 
-const ::std::string kEmptyString;
+const ::std::string* empty_string_;
+ProtobufOnceType empty_string_once_init_;
+
+void InitEmptyString() {
+  empty_string_ = new std::string();
+}
 
 }  // namespace internal
 }  // namespace protobuf
diff --git a/third_party/protobuf/src/google/protobuf/generated_message_util.h b/third_party/protobuf/src/google/protobuf/generated_message_util.h
index b2fb8f0b..098f321 100644
--- a/third_party/protobuf/src/google/protobuf/generated_message_util.h
+++ b/third_party/protobuf/src/google/protobuf/generated_message_util.h
@@ -41,6 +41,7 @@
 #include <string>
 
 #include <google/protobuf/stubs/common.h>
+#include <google/protobuf/stubs/once.h>
 namespace google {
 namespace protobuf {
 namespace internal {
@@ -59,8 +60,17 @@ namespace internal {
 LIBPROTOBUF_EXPORT double Infinity();
 LIBPROTOBUF_EXPORT double NaN();
 
-// Constant used for empty default strings.
-LIBPROTOBUF_EXPORT extern const ::std::string kEmptyString;
+// Default empty string object. Don't use the pointer directly. Instead, call
+// GetEmptyString() to get the reference.
+LIBPROTOBUF_EXPORT extern const ::std::string* empty_string_;
+LIBPROTOBUF_EXPORT extern ProtobufOnceType empty_string_once_init_;
+
+LIBPROTOBUF_EXPORT void InitEmptyString();
+
+LIBPROTOBUF_EXPORT inline const ::std::string& GetEmptyString() {
+  GoogleOnceInit(&empty_string_once_init_, &InitEmptyString);
+  return *empty_string_;
+}
 
 // Defined in generated_message_reflection.cc -- not actually part of the lite
 // library.
diff --git a/third_party/protobuf/src/google/protobuf/repeated_field.h b/third_party/protobuf/src/google/protobuf/repeated_field.h
index 570d4b7..ff5d1f4 100644
--- a/third_party/protobuf/src/google/protobuf/repeated_field.h
+++ b/third_party/protobuf/src/google/protobuf/repeated_field.h
@@ -383,7 +383,7 @@ class LIBPROTOBUF_EXPORT StringTypeHandlerBase {
   static void Clear(string* value) { value->clear(); }
   static void Merge(const string& from, string* to) { *to = from; }
   static const Type& default_instance() {
-    return ::google::protobuf::internal::kEmptyString;
+    return ::google::protobuf::internal::GetEmptyString();
   }
 };