Add explicit base namespace to string16 users.

chrome/common/extensions/api/commands/commands_handler.cc

 // Copyright (c) 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.
 
 #include "chrome/common/extensions/api/commands/commands_handler.h"
 
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/values.h"
 #include "extensions/common/error_utils.h"
@@ skipping 43 matching lines @@
       extension->GetManifestData(keys::kCommands));
   return info ? &info->named_commands : NULL;
 }
 
 CommandsHandler::CommandsHandler() {
 }
 
 CommandsHandler::~CommandsHandler() {
 }
 
-bool CommandsHandler::Parse(Extension* extension, string16* error) {
+bool CommandsHandler::Parse(Extension* extension, base::string16* error) {
   if (!extension->manifest()->HasKey(keys::kCommands)) {
     scoped_ptr<CommandsInfo> commands_info(new CommandsInfo);
     MaybeSetBrowserActionDefault(extension, commands_info.get());
     extension->SetManifestData(keys::kCommands,
                                commands_info.release());
     return true;
   }
 
   const base::DictionaryValue* dict = NULL;
   if (!extension->manifest()->GetDictionary(keys::kCommands, &dict)) {
@@ skipping 57 matching lines @@
       type == Manifest::TYPE_LEGACY_PACKAGED_APP ||
       type == Manifest::TYPE_PLATFORM_APP;
 }
 
 void CommandsHandler::MaybeSetBrowserActionDefault(const Extension* extension,
                                                    CommandsInfo* info) {
   if (extension->manifest()->HasKey(keys::kBrowserAction) &&
       !info->browser_action_command.get()) {
     info->browser_action_command.reset(
         new Command(manifest_values::kBrowserActionCommandEvent,
-                    string16(),
+                    base::string16(),
                     std::string(),
                     false));
   }
 }
 
 const std::vector<std::string> CommandsHandler::Keys() const {
   return SingleKey(keys::kCommands);
 }
 
 }  // namespace extensions