Replace string16 with base::string16.

chrome/browser/about_flags.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_ABOUT_FLAGS_H_
 #define CHROME_BROWSER_ABOUT_FLAGS_H_
 
 #include <map>
 #include <string>
 
@@ skipping 84 matching lines @@
   const Choice* choices;
 
   // Number of |choices|.
   // This is used if type is MULTI_VALUE.
   int num_choices;
 
   // Returns the name used in prefs for the choice at the specified |index|.
   std::string NameForChoice(int index) const;
 
   // Returns the human readable description for the choice at |index|.
-  string16 DescriptionForChoice(int index) const;
+  base::string16 DescriptionForChoice(int index) const;
 };
 
 // A flag controlling the behavior of the |ConvertFlagsToSwitches| function -
 // whether it should add the sentinel switches around flags.
 enum SentinelsMode { kNoSentinels, kAddSentinels };
 
 // Reads the Labs |prefs| (called "Labs" for historical reasons) and adds the
 // commandline flags belonging to the active experiments to |command_line|.
 void ConvertFlagsToSwitches(FlagsStorage* flags_storage,
                             CommandLine* command_line,
@@ skipping 57 matching lines @@
 
 // Separator used for multi values. Multi values are represented in prefs as
 // name-of-experiment + kMultiSeparator + selected_index.
 extern const char kMultiSeparator[];
 
 }  // namespace testing
 
 }  // namespace about_flags
 
 #endif  // CHROME_BROWSER_ABOUT_FLAGS_H_