Update the sadtab and throbbers to use the helpers for fetching strings/image...

chrome/chrome.gyp

 # Copyright (c) 2009 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.
 
 {
   'variables': {
     'chromium_code': 1,
 
     # Define the common dependencies that contain all the actual
     # Chromium functionality.  This list gets pulled in below by
@@ skipping 3042 matching lines @@
         'app/theme/newtab.pdf',
         'app/theme/o2_globe.png',
         'app/theme/o2_history.png',
         'app/theme/o2_more.png',
         'app/theme/o2_search.png',
         'app/theme/o2_star.png',
         'app/theme/otr_icon.pdf',
         'app/theme/pageinfo_bad.png',
         'app/theme/pageinfo_good.png',
         'app/theme/reload_Template.pdf',
-        'app/theme/sadfavicon.png',
-        'app/theme/sadtab.png',
         'app/theme/star_Template.pdf',
         'app/theme/starred.pdf',
         'app/theme/stop_Template.pdf',
-        '../app/resources/throbber.png',
-        'app/theme/throbber_waiting.png',
         'app/app-Info.plist',
       ],
       # TODO(mark): Come up with a fancier way to do this.  It should only
       # be necessary to list app-Info.plist once, not the three times it is
       # listed here.
       'mac_bundle_resources!': [
         'app/app-Info.plist',
       ],
       'xcode_settings': {
         'INFOPLIST_FILE': 'app/app-Info.plist',
@@ skipping 3017 matching lines @@
               # Use outputs of this action as inputs for the main target build.
               # Seems as a misnomer but makes this happy on Linux (scons).
               'process_outputs_as_sources': 1,
             },
           ],  # 'actions'
         },
       ]
     }],
   ],  # 'conditions'
 }