Replace image_messages.h with Mojo service

content/browser/frame_host/render_frame_host_impl.h

Index: content/browser/frame_host/render_frame_host_impl.h
diff --git a/content/browser/frame_host/render_frame_host_impl.h b/content/browser/frame_host/render_frame_host_impl.h
index 283be24ef7bcbd431ae8bec34dc477a1823255b4..fd29107664acd5c84a76c93384a6afb997d8b336 100644
--- a/content/browser/frame_host/render_frame_host_impl.h
+++ b/content/browser/frame_host/render_frame_host_impl.h
@@ -15,6 +15,7 @@
 #include "base/strings/string16.h"
 #include "base/time/time.h"
 #include "content/browser/accessibility/browser_accessibility_manager.h"
+#include "content/browser/image_downloader/image_downloader_dispatcher.h"
 #include "content/browser/site_instance_impl.h"
 #include "content/common/accessibility_mode_enums.h"
 #include "content/common/content_export.h"
@@ -428,6 +429,13 @@ class CONTENT_EXPORT RenderFrameHostImpl
   // addition, its associated RenderWidgetHost has to be focused.
   bool IsFocused();
 
+  // Download image API called by web_contents.
+  int DownloadImage(const GURL& url,
+                    bool is_favicon,
+                    uint32_t max_bitmap_size,
+                    bool bypass_cache,
+                    const WebContents::ImageDownloadCallback& callback);
+
  protected:
   friend class RenderFrameHostFactory;
 
@@ -696,6 +704,9 @@ class CONTENT_EXPORT RenderFrameHostImpl
   // Context shared for each PermissionService instance created for this RFH.
   scoped_ptr<PermissionServiceContext> permission_service_context_;
 
+  // Dispatcher to do IPC with ImageDownloader Mojo service in Renderer side.

[nasko, 2015/04/15 20:57:22]

nit: "Renderer" isn't very clear. Is it the renderer process? The RenderFrame
object? Or something else altogether.

[leonhsl(Using Gerrit), 2015/04/17 06:14:34]

Done. "Renderer side" ---> "RenderFrame"

+  scoped_ptr<ImageDownloaderDispatcher> image_downloader_dispatcher_;
+
   // NOTE: This must be the last member.
   base::WeakPtrFactory<RenderFrameHostImpl> weak_ptr_factory_;