Split FaviconHelper in two: ImageLoadingHelper and FaviconHelper

content/renderer/image_loading_helper.h

-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// 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_FAVICON_HELPER_H_
-#define CONTENT_RENDERER_FAVICON_HELPER_H_
+#ifndef CONTENT_RENDERER_IMAGE_LOADING_HELPER_H_
+#define CONTENT_RENDERER_IMAGE_LOADING_HELPER_H_
 
 #include <string>
 #include <vector>
 
-#include "base/memory/linked_ptr.h"
 #include "base/memory/scoped_vector.h"
-#include "base/memory/weak_ptr.h"
-#include "content/public/common/content_constants.h"
 #include "content/public/renderer/render_view_observer.h"
 #include "googleurl/src/gurl.h"
 
 class SkBitmap;
 
-namespace content {
-struct FaviconURL;
-}
-
 namespace webkit_glue {
 class MultiResolutionImageResourceFetcher;
 }
 
 namespace content {
 
-struct FaviconURL;
-
-// This class deals with favicon downloading.
-// There is one FaviconHelper per RenderView, which is owned by the RenderView.
-class FaviconHelper : public RenderViewObserver {
+// This class deals with image downloading.
+// One instance of ImageLoadingHelper is owned by RenderView.
+class ImageLoadingHelper : public RenderViewObserver {
  public:
-  explicit FaviconHelper(RenderView* render_view);
-
-  // Send a message that the favicon has changed.
-  void DidChangeIcon(WebKit::WebFrame* frame,
-                     WebKit::WebIconURL::Type icon_type);
+  explicit ImageLoadingHelper(RenderView* render_view);
 
  private:
-  virtual ~FaviconHelper();
-
-  // Start processing the icon change. This done async from DidChangeIcon in
-  // case there are several calls to DidChangeIcon in a row.
-  void ProcessDidChangeIcon();
+  virtual ~ImageLoadingHelper();
 
   // Message handler.
-  void OnDownloadFavicon(int id,
-                         const GURL& image_url,
-                         bool is_favicon,
-                         int image_size);
-
-  // Requests to download a favicon image. When done, the RenderView
-  // is notified by way of DidDownloadFavicon. Returns true if the
-  // request was successfully started, false otherwise. id is used to
-  // uniquely identify the request and passed back to the
-  // DidDownloadFavicon method. If the image is a favicon, cookies are
-  // not sent and not accepted during download.
-  // If the image has multiple frames, the
-  // frame whose size is image_size is returned. If the image doesn't
-  // have a frame at the specified size, the first is returned.
-  bool DownloadFavicon(int id,
+  void OnDownloadImage(int id,
                        const GURL& image_url,
                        bool is_favicon,
                        int image_size);
 
-  // This callback is triggered when DownloadFavicon completes, either
-  // succesfully or with a failure. See DownloadFavicon for more
+  // 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, the
+  // frame whose size is image_size is returned. If the image doesn't
+  // have a frame at the specified size, the first is returned.
+  bool DownloadImage(int id,
+                     const GURL& image_url,
+                     bool is_favicon,
+                     int image_size);
+
+  // This callback is triggered when DownloadImage completes, either
+  // succesfully or with a failure. See DownloadImage for more
   // details.
-  void DidDownloadFavicon(
+  void DidDownloadImage(
       int requested_size,
       webkit_glue::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;
 
-  // Send a message to update the favicon URL for a page.
-  void SendUpdateFaviconURL(int32 routing_id,
-                            int32 page_id,
-                            const std::vector<FaviconURL>& urls);
-
   // RenderViewObserver implementation.
   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
-  virtual void DidStopLoading() OVERRIDE;
 
   typedef ScopedVector<webkit_glue::MultiResolutionImageResourceFetcher>
-    ImageResourceFetcherList;
+      ImageResourceFetcherList;
 
   // ImageResourceFetchers schedule via DownloadImage.
   ImageResourceFetcherList image_fetchers_;
 
-  // The set of flags which have been sent to DidChangeIcon but not yet
-  // processed.
-  WebKit::WebIconURL::Type icon_types_changed_;
-
-  base::WeakPtrFactory<FaviconHelper> weak_ptr_factory_;
-
-  DISALLOW_COPY_AND_ASSIGN(FaviconHelper);
+  DISALLOW_COPY_AND_ASSIGN(ImageLoadingHelper);
 };
 
-} // namespace content
+}  // namespace content
 
-#endif  // CONTENT_RENDERER_FAVICON_HELPER_H_
+#endif  // CONTENT_RENDERER_IMAGE_LOADING_HELPER_H_
+