Reload favicon from HTTP cache on Ctrl+Refresh

content/renderer/image_loading_helper.h

 // Copyright (c) 2013 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_IMAGE_LOADING_HELPER_H_
 #define CONTENT_RENDERER_IMAGE_LOADING_HELPER_H_
 
 #include <string>
 #include <vector>
 
 #include "base/memory/scoped_vector.h"
 #include "content/public/renderer/render_frame_observer.h"
+#include "third_party/WebKit/public/platform/WebURLRequest.h"
 #include "url/gurl.h"
 
 class SkBitmap;
 
 namespace content {
 
 class MultiResolutionImageResourceFetcher;
 
 // This class deals with image downloading.
 // One instance of ImageLoadingHelper is owned by RenderFrame.
 class ImageLoadingHelper : public RenderFrameObserver {
  public:
   explicit ImageLoadingHelper(RenderFrame* render_frame);
 
  private:
   ~ImageLoadingHelper() override;
 
   // Message handler.
   void OnDownloadImage(int id,
                        const GURL& image_url,
                        bool is_favicon,
-                       uint32_t max_image_size);
+                       uint32_t max_image_size,
+                       blink::WebURLRequest::CachePolicy cache_policy);
 
   // Requests to download an image. When done, the ImageLoadingHelper
   // is notified by way of DidDownloadImage. Returns true if the
   // request was successfully started, false otherwise. id is used to
   // uniquely identify the request and passed back to the
   // DidDownloadImage method. If the image is a favicon, cookies will not be
   // sent nor accepted during download. If the image has multiple frames, all
   // the frames whose size <= |max_image_size| are returned. If all of the
   // frames are larger than |max_image_size|, the smallest frame is resized to
   // |max_image_size| and is the only result. |max_image_size| == 0 is
   // interpreted as no max image size.
   bool DownloadImage(int id,
                      const GURL& image_url,
                      bool is_favicon,
-                     uint32_t max_image_size);
+                     uint32_t max_image_size,
+                     blink::WebURLRequest::CachePolicy cache_policy);
 
   // This callback is triggered when DownloadImage completes, either
   // succesfully or with a failure. See DownloadImage for more
   // details.
   void DidDownloadImage(
       uint32_t max_image_size,
       MultiResolutionImageResourceFetcher* fetcher,
       const std::vector<SkBitmap>& images);
 
   // Decodes a data: URL image or returns an empty image in case of failure.
   SkBitmap ImageFromDataUrl(const GURL&) const;
 
   // RenderFrameObserver implementation.
   bool OnMessageReceived(const IPC::Message& message) override;
 
   typedef ScopedVector<MultiResolutionImageResourceFetcher>
       ImageResourceFetcherList;
 
   // ImageResourceFetchers schedule via DownloadImage.
   ImageResourceFetcherList image_fetchers_;
 
   DISALLOW_COPY_AND_ASSIGN(ImageLoadingHelper);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_IMAGE_LOADING_HELPER_H_