4 files changed, 27 insertions, 6 deletions
diff --git a/base/json/json_reader.h b/base/json/json_reader.h
index 4f83492..46e450c 100644
--- a/base/json/json_reader.h
+++ b/base/json/json_reader.h
@@ -43,10 +43,10 @@
 #define FRIEND_TEST(test_case_name, test_name)\
 friend class test_case_name##_##test_name##_Test
 
-class Value;
-
 namespace base {
 
+class Value;
+
 class BASE_API JSONReader {
  public:
   // A struct to hold a JS token.
diff --git a/base/json/json_writer.h b/base/json/json_writer.h
index c019e87..36331bb 100644
--- a/base/json/json_writer.h
+++ b/base/json/json_writer.h
@@ -11,10 +11,10 @@
 #include "base/base_api.h"
 #include "base/basictypes.h"
 
-class Value;
-
 namespace base {
 
+class Value;
+
 class BASE_API JSONWriter {
  public:
   // Given a root node, generates a JSON string and puts it into |json|.
diff --git a/base/value_conversions.h b/base/value_conversions.h
index 75246d1..5ed7550c 100644
--- a/base/value_conversions.h
+++ b/base/value_conversions.h
@@ -11,11 +11,12 @@
 #include "base/base_api.h"
 
 class FilePath;
-class StringValue;
-class Value;
 
 namespace base {
 
+class StringValue;
+class Value;
+
 // The caller takes ownership of the returned value.
 BASE_API StringValue* CreateFilePathValue(const FilePath& in_value);
 BASE_API bool GetValueAsFilePath(const Value& value, FilePath* file_path);
diff --git a/base/values.h b/base/values.h
index a00a17c..21ddfce 100644
--- a/base/values.h
+++ b/base/values.h
@@ -32,6 +32,13 @@
 #include "base/string16.h"
 #include "build/build_config.h"
 
+// This file declares "using base::Value", etc. at the bottom, so that
+// current code can use these classes without the base namespace. In
+// new code, please always use base::Value, etc. or add your own
+// "using" declaration.
+// http://crbug.com/88666
+namespace base {
+
 class BinaryValue;
 class DictionaryValue;
 class FundamentalValue;
@@ -455,4 +462,17 @@ class BASE_API ValueSerializer {
   virtual Value* Deserialize(int* error_code, std::string* error_str) = 0;
 };
 
+}  // namespace base
+
+// http://crbug.com/88666
+using base::BinaryValue;
+using base::DictionaryValue;
+using base::FundamentalValue;
+using base::ListValue;
+using base::StringValue;
+using base::Value;
+using base::ValueMap;
+using base::ValueSerializer;
+using base::ValueVector;
+
 #endif  // BASE_VALUES_H_