Add base:: to string16 in extensions/.

extensions/common/value_builder.h

 // Copyright 2013 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.
 
 // This file provides a builders for DictionaryValue and ListValue.  These
 // aren't specific to extensions and could move up to base/ if there's interest
 // from other sub-projects.
 //
 // The general pattern is to write:
 //
@@ skipping 41 matching lines @@
   // Workaround to allow you to pass rvalue ExtensionBuilders by reference to
   // other functions.
   DictionaryBuilder& Pass() { return *this; }
 
   // Can only be called once, after which it's invalid to use the builder.
   scoped_ptr<base::DictionaryValue> Build() { return dict_.Pass(); }
 
   DictionaryBuilder& Set(const std::string& path, int in_value);
   DictionaryBuilder& Set(const std::string& path, double in_value);
   DictionaryBuilder& Set(const std::string& path, const std::string& in_value);
-  DictionaryBuilder& Set(const std::string& path, const string16& in_value);
+  DictionaryBuilder& Set(const std::string& path,
+                         const base::string16& in_value);
   DictionaryBuilder& Set(const std::string& path, DictionaryBuilder& in_value);
   DictionaryBuilder& Set(const std::string& path, ListBuilder& in_value);
 
   // Named differently because overload resolution is too eager to
   // convert implicitly to bool.
   DictionaryBuilder& SetBoolean(const std::string& path, bool in_value);
 
  private:
   scoped_ptr<base::DictionaryValue> dict_;
 };
 
 class ListBuilder {
  public:
   ListBuilder();
   explicit ListBuilder(const base::ListValue& init);
   ~ListBuilder();
 
   // Workaround to allow you to pass rvalue ExtensionBuilders by reference to
   // other functions.
   ListBuilder& Pass() { return *this; }
 
   // Can only be called once, after which it's invalid to use the builder.
   scoped_ptr<base::ListValue> Build() { return list_.Pass(); }
 
   ListBuilder& Append(int in_value);
   ListBuilder& Append(double in_value);
   ListBuilder& Append(const std::string& in_value);
-  ListBuilder& Append(const string16& in_value);
+  ListBuilder& Append(const base::string16& in_value);
   ListBuilder& Append(DictionaryBuilder& in_value);
   ListBuilder& Append(ListBuilder& in_value);
 
   // Named differently because overload resolution is too eager to
   // convert implicitly to bool.
   ListBuilder& AppendBoolean(bool in_value);
 
  private:
   scoped_ptr<base::ListValue> list_;
 };
 
 } // namespace extensions
 
 #endif  // EXTENSIONS_COMMON_VALUE_BUILDER_H_