Enables HiDPI favicon to be displayed in tab strip on CrOS

chrome/browser/ui/views/tabs/tab_renderer_data.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/tabs/tab_renderer_data.h"
 
 TabRendererData::TabRendererData()
     : network_state(NETWORK_STATE_NONE),
       loading(false),
       crashed_status(base::TERMINATION_STATUS_STILL_RUNNING),
       incognito(false),
       show_icon(true),
       mini(false),
       blocked(false),
       app(false),
       mode(chrome::search::Mode::MODE_DEFAULT),
       gradient_background_opacity(1.0f) {
 }
 
 TabRendererData::~TabRendererData() {}
 
 bool TabRendererData::Equals(const TabRendererData& data) {
   return
-      favicon.pixelRef() &&
-      favicon.pixelRef() == data.favicon.pixelRef() &&
-      favicon.pixelRefOffset() == data.favicon.pixelRefOffset() &&
+      favicon.BackedBySameObjectAs(data.favicon) &&
       network_state == data.network_state &&
       title == data.title &&
       url == data.url &&
       loading == data.loading &&
       crashed_status == data.crashed_status &&
       incognito == data.incognito &&
       show_icon == data.show_icon &&
       mini == data.mini &&
       blocked == data.blocked &&
       app == data.app &&
       mode == data.mode &&
       gradient_background_opacity == data.gradient_background_opacity;
 }