Use base namespace for string16 in chrome/renderer.

chrome/renderer/chrome_content_renderer_client.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_RENDERER_CHROME_CONTENT_RENDERER_CLIENT_H_
 #define CHROME_RENDERER_CHROME_CONTENT_RENDERER_CLIENT_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 69 matching lines @@
       const base::FilePath& plugin_path) OVERRIDE;
   virtual bool HasErrorPage(int http_status_code,
                             std::string* error_domain) OVERRIDE;
   virtual bool ShouldSuppressErrorPage(const GURL& url) OVERRIDE;
   virtual void GetNavigationErrorStrings(
       blink::WebFrame* frame,
       const blink::WebURLRequest& failed_request,
       const blink::WebURLError& error,
       const std::string& accept_languages,
       std::string* error_html,
-      string16* error_description) OVERRIDE;
+      base::string16* error_description) OVERRIDE;
   virtual void DeferMediaLoad(content::RenderView* render_view,
                               const base::Closure& closure) OVERRIDE;
   virtual bool RunIdleHandlerWhenWidgetsHidden() OVERRIDE;
   virtual bool AllowPopup() OVERRIDE;
   virtual bool ShouldFork(blink::WebFrame* frame,
                           const GURL& url,
                           const std::string& http_method,
                           bool is_initial_navigation,
                           bool is_server_redirect,
                           bool* send_referrer) OVERRIDE;
@@ skipping 110 matching lines @@
   scoped_ptr<visitedlink::VisitedLinkSlave> visited_link_slave_;
   scoped_ptr<safe_browsing::PhishingClassifierFilter> phishing_classifier_;
   scoped_ptr<prerender::PrerenderDispatcher> prerender_dispatcher_;
 #if defined(ENABLE_WEBRTC)
   scoped_refptr<WebRtcLoggingMessageFilter> webrtc_logging_message_filter_;
 #endif
   scoped_ptr<SearchBouncer> search_bouncer_;
 };
 
 #endif  // CHROME_RENDERER_CHROME_CONTENT_RENDERER_CLIENT_H_