Use hi-resolution favicon variants if available.

chrome/browser/ui/views/ash/balloon_view_ash.cc

 // 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.
 
 #include "chrome/browser/ui/views/ash/balloon_view_ash.h"
 
 #include "ash/shell.h"
 #include "ash/system/status_area_widget.h"
 #include "ash/system/web_notification/web_notification_tray.h"
 #include "base/logging.h"
@@ skipping 47 matching lines @@
     IPC_BEGIN_MESSAGE_MAP(IconFetcher, message)
       IPC_MESSAGE_HANDLER(IconHostMsg_DidDownloadFavicon, OnDidDownloadFavicon)
       IPC_MESSAGE_UNHANDLED(message_handled = false)
     IPC_END_MESSAGE_MAP()
     return message_handled;
   }
 
   void OnDidDownloadFavicon(int id,
                             const GURL& image_url,
                             bool errored,
-                            const SkBitmap& bitmap) {
-    if (image_url != icon_url_ || id != request_id_)
+                            int requested_size,
+                            const std::vector<SkBitmap>& bitmaps) {
+    if (image_url != icon_url_ || id != request_id_ || bitmaps.empty())
       return;
     GetWebNotificationTray()->SetNotificationImage(
-        notification_id_, gfx::ImageSkia(bitmap));
+        notification_id_, gfx::ImageSkia(bitmaps[0]));
   }
 
  private:
   int request_id_;
   std::string notification_id_;
   GURL icon_url_;
 
   DISALLOW_COPY_AND_ASSIGN(IconFetcher);
 };
 
@@ skipping 73 matching lines @@
   ExtensionService* extension_service =
       balloon_->profile()->GetExtensionService();
   const GURL& origin = balloon_->notification().origin_url();
   const extensions::Extension* extension =
       extension_service->extensions()->GetExtensionOrAppByURL(
           ExtensionURLInfo(origin));
   if (extension)
     return extension->id();
   return std::string();
 }