mac: Delete GetCachedImageWithName(), it's no longer used.

chrome/chrome_tests_unit.gypi

  # Copyright 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': [
     {
       # This target contains mocks and test utilities that don't belong in
       # production libraries but are used by more than one test executable.
       'target_name': 'test_support_common',
       'type': 'static_library',
@@ skipping 1278 matching lines @@
         'browser/ui/cocoa/location_bar/autocomplete_text_field_unittest.mm',
         'browser/ui/cocoa/location_bar/autocomplete_text_field_unittest_helper.mm',
         'browser/ui/cocoa/location_bar/ev_bubble_decoration_unittest.mm',
         'browser/ui/cocoa/location_bar/image_decoration_unittest.mm',
         'browser/ui/cocoa/location_bar/keyword_hint_decoration_unittest.mm',
         'browser/ui/cocoa/location_bar/selected_keyword_decoration_unittest.mm',
         'browser/ui/cocoa/location_bar/web_intents_button_decoration_unittest.mm',
         'browser/ui/cocoa/menu_button_unittest.mm',
         'browser/ui/cocoa/menu_controller_unittest.mm',
         'browser/ui/cocoa/notifications/balloon_controller_unittest.mm',
-        'browser/ui/cocoa/nsimage_cache_unittest.mm',
         'browser/ui/cocoa/nsmenuitem_additions_unittest.mm',
         'browser/ui/cocoa/nsview_additions_unittest.mm',
         'browser/ui/cocoa/omnibox/omnibox_popup_view_mac_unittest.mm',
         'browser/ui/cocoa/omnibox/omnibox_view_mac_unittest.mm',
         'browser/ui/cocoa/one_click_signin_bubble_controller_unittest.mm',
         'browser/ui/cocoa/panels/panel_cocoa_unittest.mm',
         'browser/ui/cocoa/profile_menu_controller_unittest.mm',
         'browser/ui/cocoa/ratings_view_unittest.mm',
         'browser/ui/cocoa/run_loop_testing_unittest.mm',
         'browser/ui/cocoa/status_bubble_mac_unittest.mm',
@@ skipping 1048 matching lines @@
               # more details.
               'DebugInformationFormat': '3',
               'ProgramDataBaseFileName': '<(PRODUCT_DIR)/unit_tests.exe.pdb',
             },
           },
         },
       ],
     }],
   ],  # 'conditions'
 }