Move MessageLoop to base namespace.

chrome/browser/ui/webui/ntp/thumbnail_source.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_BROWSER_UI_WEBUI_NTP_THUMBNAIL_SOURCE_H_
 #define CHROME_BROWSER_UI_WEBUI_NTP_THUMBNAIL_SOURCE_H_
 
 #include <map>
 #include <string>
 
@@ skipping 17 matching lines @@
  public:
   explicit ThumbnailSource(Profile* profile);
 
   // content::URLDataSource implementation.
   virtual std::string GetSource() OVERRIDE;
   virtual void StartDataRequest(
       const std::string& path,
       bool is_incognito,
       const content::URLDataSource::GotDataCallback& callback) OVERRIDE;
   virtual std::string GetMimeType(const std::string& path) const OVERRIDE;
-  virtual MessageLoop* MessageLoopForRequestPath(
+  virtual base::MessageLoop* MessageLoopForRequestPath(
       const std::string& path) const OVERRIDE;
   virtual bool ShouldServiceRequest(
       const net::URLRequest* request) const OVERRIDE;
 
  private:
   virtual ~ThumbnailSource();
 
   // Raw PNG representation of the thumbnail to show when the thumbnail
   // database doesn't have a thumbnail for a webpage.
   scoped_refptr<base::RefCountedMemory> default_thumbnail_;
 
   // ThumbnailService.
   scoped_refptr<thumbnails::ThumbnailService> thumbnail_service_;
 
   // Transient mappings from an ID-based path to an URL-based path.
   // The key is an ID-string, the value is a URL string.
   // Mappings are added in ShouldServiceRequest() and erased once
   // the request is serviced in StartDataRequest().
   // TODO(dhollowa): Consider passing the |request| object through
   // to the StartDataRequest() call.
   mutable std::map<std::string, std::string> id_to_url_map_;
 
   // Only used when servicing requests on the UI thread.
   Profile* const profile_;
 
   DISALLOW_COPY_AND_ASSIGN(ThumbnailSource);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_NTP_THUMBNAIL_SOURCE_H_