Use high resolution icons where possible for streamlined hosted app icons.

chrome/chrome_browser_extensions.gypi

 # 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.
 
 {
   'targets': [
     {
       'target_name': 'browser_extensions',
       'type': 'static_library',
       'variables': { 'enable_wexit_time_destructors': 1, },
@@ skipping 769 matching lines @@
         'browser/extensions/external_loader.h',
         'browser/extensions/external_policy_loader.cc',
         'browser/extensions/external_policy_loader.h',
         'browser/extensions/external_pref_loader.cc',
         'browser/extensions/external_pref_loader.h',
         'browser/extensions/external_provider_impl.cc',
         'browser/extensions/external_provider_impl.h',
         'browser/extensions/external_provider_interface.h',
         'browser/extensions/external_registry_loader_win.cc',
         'browser/extensions/external_registry_loader_win.h',
+        'browser/extensions/favicon_downloader.cc',
+        'browser/extensions/favicon_downloader.h',
         'browser/extensions/global_shortcut_listener.cc',
         'browser/extensions/global_shortcut_listener.h',
         'browser/extensions/global_shortcut_listener_chromeos.cc',
         'browser/extensions/global_shortcut_listener_chromeos.h',
         'browser/extensions/global_shortcut_listener_mac.cc',
         'browser/extensions/global_shortcut_listener_mac.h',
         'browser/extensions/global_shortcut_listener_ozone.cc',
         'browser/extensions/global_shortcut_listener_ozone.h',
         'browser/extensions/global_shortcut_listener_win.cc',
         'browser/extensions/global_shortcut_listener_win.h',
@@ skipping 390 matching lines @@
           'variables': {
             'proto_in_dir': 'browser/chromeos/contacts',
             'proto_out_dir': 'chrome/browser/chromeos/contacts',
           },
           'includes': [ '../build/protoc.gypi' ]
         },
       ],
     },],  # 'chromeos=1'
   ],  # 'conditions'
 }