4 files changed, 7 insertions, 9 deletions
diff --git a/chrome/browser/search/local_ntp_source.cc b/chrome/browser/search/local_ntp_source.cc
index 38cbd7a..d1fde35 100644
--- a/chrome/browser/search/local_ntp_source.cc
+++ b/chrome/browser/search/local_ntp_source.cc
@@ -74,7 +74,7 @@ std::string LocalNtpSource::GetMimeType(
       path == kCloseBarActiveFilename) {
     return "image/png";
   }
-  return std::string();
+  return "";
 }
 
 bool LocalNtpSource::ShouldServiceRequest(
diff --git a/chrome/browser/search/local_omnibox_popup_source.cc b/chrome/browser/search/local_omnibox_popup_source.cc
index fa2d940..1ae3c8a 100644
--- a/chrome/browser/search/local_omnibox_popup_source.cc
+++ b/chrome/browser/search/local_omnibox_popup_source.cc
@@ -76,7 +76,7 @@ std::string LocalOmniboxPopupSource::GetMimeType(
   if (path == kPageIconFilename || path == kPageIcon2xFilename ||
       path == kSearchIconFilename || path == kSearchIcon2xFilename)
     return "image/png";
-  return std::string();
+  return "";
 }
 
 bool LocalOmniboxPopupSource::ShouldServiceRequest(
diff --git a/chrome/browser/search/search.cc b/chrome/browser/search/search.cc
index 726bc89..83186b4 100644
--- a/chrome/browser/search/search.cc
+++ b/chrome/browser/search/search.cc
@@ -527,8 +527,7 @@ uint64 GetUInt64ValueForFlagWithDefault(const std::string& flag,
                                         uint64 default_value,
                                         const FieldTrialFlags& flags) {
   uint64 value;
-  std::string str_value =
-      GetStringValueForFlagWithDefault(flag, std::string(), flags);
+  std::string str_value = GetStringValueForFlagWithDefault(flag, "", flags);
   if (base::StringToUint64(str_value, &value))
     return value;
   return default_value;
diff --git a/chrome/browser/search/search_unittest.cc b/chrome/browser/search/search_unittest.cc
index 7c4bf4c..90ff642b 100644
--- a/chrome/browser/search/search_unittest.cc
+++ b/chrome/browser/search/search_unittest.cc
@@ -22,7 +22,7 @@ TEST(EmbeddedSearchFieldTrialTest, GetFieldTrialInfo) {
   uint64 group_number = 0;
   const uint64 ZERO = 0;
 
-  EXPECT_FALSE(GetFieldTrialInfo(std::string(), &flags, &group_number));
+  EXPECT_FALSE(GetFieldTrialInfo("", &flags, &group_number));
   EXPECT_EQ(ZERO, group_number);
   EXPECT_EQ(ZERO, flags.size());
 
@@ -62,10 +62,9 @@ TEST(EmbeddedSearchFieldTrialTest, GetFieldTrialInfo) {
   EXPECT_EQ(uint64(3), flags.size());
   EXPECT_EQ(true, GetBoolValueForFlagWithDefault("bar", false, flags));
   EXPECT_EQ(uint64(7), GetUInt64ValueForFlagWithDefault("baz", 0, flags));
-  EXPECT_EQ("dogs",
-            GetStringValueForFlagWithDefault("cat", std::string(), flags));
-  EXPECT_EQ("default",
-            GetStringValueForFlagWithDefault("moose", "default", flags));
+  EXPECT_EQ("dogs", GetStringValueForFlagWithDefault("cat", "", flags));
+  EXPECT_EQ("default", GetStringValueForFlagWithDefault(
+      "moose", "default", flags));
 
   group_number = 0;
   flags.clear();