chromeos: Fix pixelated icons in app list and launcher (part 2)

chrome/chrome_browser_extensions.gypi

 # 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.
 
 {
   'targets': [
     {
       'target_name': 'browser_extensions',
       'type': 'static_library',
       'variables': { 'enable_wexit_time_destructors': 1, },
@@ skipping 304 matching lines @@
         'browser/extensions/extension_function_util.cc',
         'browser/extensions/extension_function_util.h',
         'browser/extensions/extension_global_error_badge.cc',
         'browser/extensions/extension_global_error_badge.h',
         'browser/extensions/extension_host.cc',
         'browser/extensions/extension_host.h',
         'browser/extensions/extension_host_mac.h',
         'browser/extensions/extension_host_mac.mm',
         'browser/extensions/extension_icon_manager.cc',
         'browser/extensions/extension_icon_manager.h',
+        'browser/extensions/extension_icon_image.cc',
+        'browser/extensions/extension_icon_image.h',
+        'browser/extensions/extension_icon_image_delegate.h',
         'browser/extensions/extension_idle_api_constants.cc',
         'browser/extensions/extension_idle_api_constants.h',
         'browser/extensions/extension_info_map.cc',
         'browser/extensions/extension_info_map.h',
         'browser/extensions/extension_info_private_api_chromeos.cc',
         'browser/extensions/extension_info_private_api_chromeos.h',
         'browser/extensions/extension_infobar_delegate.cc',
         'browser/extensions/extension_infobar_delegate.h',
         'browser/extensions/extension_input_module_constants.cc',
         'browser/extensions/extension_input_module_constants.h',
@@ skipping 377 matching lines @@
             'browser/extensions/api/usb/usb_api.h',
             'browser/extensions/api/usb/usb_device_resource.cc',
             'browser/extensions/api/usb/usb_device_resource.h',
           ],
         }],
       ],
     },
   ],
 }