Use base namespace for string16 in chrome/renderer.

chrome/renderer/extensions/extension_helper.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/renderer/extensions/extension_helper.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
 #include "base/json/json_string_value_serializer.h"
@@ skipping 306 matching lines @@
   // chrome.tabs.executeScript() only supports execution in either the top frame
   // or all frames.  We handle both cases in the top frame.
   SchedulerMap::iterator i = g_schedulers.Get().find(main_frame);
   if (i != g_schedulers.Get().end())
     i->second->ExecuteCode(params);
 }
 
 void ExtensionHelper::OnGetApplicationInfo(int page_id) {
   WebApplicationInfo app_info;
   if (page_id == render_view()->GetPageId()) {
-    string16 error;
+    base::string16 error;
     web_apps::ParseWebAppFromWebDocument(
         render_view()->GetWebView()->mainFrame(), &app_info, &error);
   }
 
   // Prune out any data URLs in the set of icons.  The browser process expects
   // any icon with a data URL to have originated from a favicon.  We don't want
   // to decode arbitrary data URLs in the browser process.  See
   // http://b/issue?id=1162972
   for (size_t i = 0; i < app_info.icons.size(); ++i) {
     if (app_info.icons[i].url.SchemeIs(chrome::kDataScheme)) {
@@ skipping 31 matching lines @@
       render_view()->GetWebView()->mainFrame()->mainWorldScriptContext();
   ChromeV8Context* chrome_v8_context =
       dispatcher_->v8_context_set().GetByV8Context(script_context);
   if (!chrome_v8_context)
     return;
   chrome_v8_context->module_system()->CallModuleMethod(
       "app.window", "onAppWindowClosed");
 }
 
 }  // namespace extensions