Rip out browser-side RID caching for most visited items.

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>
 
 #include "base/basictypes.h"
 #include "base/memory/ref_counted.h"
 #include "content/public/browser/url_data_source.h"
 
 class Profile;
 
 namespace base {
 class RefCountedMemory;
@@ skipping 25 matching lines @@
  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_