Don't request missing favicon on every page request.

content/renderer/fetchers/multi_resolution_image_resource_fetcher.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 CONTENT_RENDERER_FETCHERS_MULTI_RESOLUTION_IMAGE_RESOURCE_FETCHER_H_
 #define CONTENT_RENDERER_FETCHERS_MULTI_RESOLUTION_IMAGE_RESOURCE_FETCHER_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
@@ skipping 19 matching lines @@
       const Callback& callback);
 
   virtual ~MultiResolutionImageResourceFetcher();
 
   // URL of the image we're downloading.
   const GURL& image_url() const { return image_url_; }
 
   // Unique identifier for the request.
   int id() const { return id_; }
 
+  // HTTP status code upon fetch completion.
+  int http_status_code() const { return http_status_code_; }
+
  private:
   // ResourceFetcher::Callback. Decodes the image and invokes callback_.
   void OnURLFetchComplete(const WebKit::WebURLResponse& response,
                           const std::string& data);
 
   Callback callback_;
 
   // Unique identifier for the request.
   const int id_;
 
+  // HTTP status code upon fetch completion.
+  int http_status_code_;
+
   // URL of the image.
   const GURL image_url_;
 
   // Does the actual download.
   scoped_ptr<ResourceFetcher> fetcher_;
 
   DISALLOW_COPY_AND_ASSIGN(MultiResolutionImageResourceFetcher);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_FETCHERS_MULTI_RESOLUTION_IMAGE_RESOURCE_FETCHER_H_