Add base:: to string16s in chrome/.

chrome/utility/extensions/unpacker.cc

 // 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.
 
 #include "chrome/utility/extensions/unpacker.h"
 
 #include <set>
 
 #include "base/file_util.h"
 #include "base/files/file_enumerator.h"
@@ skipping 271 matching lines @@
   internal_data_->decoded_images.push_back(MakeTuple(image_bitmap, path));
   return true;
 }
 
 bool Unpacker::ReadMessageCatalog(const base::FilePath& message_path) {
   std::string error;
   JSONFileValueSerializer serializer(message_path);
   scoped_ptr<base::DictionaryValue> root(static_cast<base::DictionaryValue*>(
       serializer.Deserialize(NULL, &error)));
   if (!root.get()) {
-    string16 messages_file = message_path.LossyDisplayName();
+    base::string16 messages_file = message_path.LossyDisplayName();
     if (error.empty()) {
       // If file is missing, Deserialize will fail with empty error.
       SetError(base::StringPrintf("%s %s", errors::kLocalesMessagesFileMissing,
                                   UTF16ToUTF8(messages_file).c_str()));
     } else {
       SetError(base::StringPrintf("%s: %s",
                                   UTF16ToUTF8(messages_file).c_str(),
                                   error.c_str()));
     }
     return false;
@@ skipping 13 matching lines @@
   }
   parsed_catalogs_->Set(dir_name, root.release());
 
   return true;
 }
 
 void Unpacker::SetError(const std::string &error) {
   SetUTF16Error(UTF8ToUTF16(error));
 }
 
-void Unpacker::SetUTF16Error(const string16 &error) {
+void Unpacker::SetUTF16Error(const base::string16& error) {
   error_message_ = error;
 }
 
 }  // namespace extensions