Remove ENABLE_MESSAGE_CENTER

ui/message_center/message_center.gyp

 # 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.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'targets': [
     {
       'target_name': 'message_center',
       'type': '<(component)',
       'dependencies': [
         '../../base/base.gyp:base',
         '../../base/base.gyp:base_i18n',
         '../../base/third_party/dynamic_annotations/dynamic_annotations.gyp:dynamic_annotations',
         '../../build/temp_gyp/googleurl.gyp:googleurl',
         '../../skia/skia.gyp:skia',
         '../base/strings/ui_strings.gyp:ui_strings',
-        '../compositor/compositor.gyp:compositor',
         '../ui.gyp:ui',
         '../ui.gyp:ui_resources',
       ],
       'defines': [
         'MESSAGE_CENTER_IMPLEMENTATION',
       ],
       'sources': [
         'cocoa/notification_controller.h',
         'cocoa/notification_controller.mm',
         'cocoa/popup_collection.h',
         'cocoa/popup_collection.mm',
         'cocoa/popup_controller.h',
         'cocoa/popup_controller.mm',
+        'dummy_message_center.cc',
         'message_center.cc',
         'message_center.h',
         'message_center_constants.cc',
         'message_center_constants.h',
         'message_center_export.h',
         'message_center_impl.cc',
         'message_center_impl.h',
         'message_center_observer.h',
         'message_center_switches.cc',
         'message_center_switches.h',
@@ skipping 46 matching lines @@
           ],
         }],
         ['OS=="mac"', {
           'dependencies': [
             '../ui.gyp:ui_cocoa_third_party_toolkits',
           ],
           'include_dirs': [
             '../../third_party/GTM',
           ],
         }],
+        ['OS!="ios"', {
+          'dependencies': [
+            '../compositor/compositor.gyp:compositor',
+          ],
+        }],
+        ['notifications==0', {  # Android and iOS.
+          'sources/': [
+            # Exclude everything except dummy impl.
+            ['exclude', '\\.(cc|mm)$'],
+            ['include', '^dummy_message_center\\.cc$'],
+            ['include', '^message_center_switches\\.cc$'],
+          ],
+        }, {  # notifications==1 
+          'sources!': [ 'dummy_message_center.cc' ],
+        }],
       ],
     },  # target_name: message_center
     {
       'target_name': 'message_center_unittests',
       'type': 'executable',
       'dependencies': [
         '../../base/base.gyp:base',
         '../../base/base.gyp:test_support_base',
         '../../skia/skia.gyp:skia',
         '../../testing/gtest.gyp:gtest',
@@ skipping 25 matching lines @@
             '../compositor/compositor.gyp:compositor_test_support',
             '../views/views.gyp:views',
             '../views/views.gyp:views_test_support',
           ],
           'sources': [
             'views/bounded_label_unittest.cc',
             'views/message_center_view_unittest.cc',
             'views/message_popup_collection_unittest.cc',
           ],
         }],
+        ['notifications==0', {  # Android and iOS.
+          'sources/': [
+            # Exclude everything except main().
+            ['exclude', '\\.(cc|mm)$'],
+            ['include', '^test/run_all_unittests\\.cc$'],
+          ],
+        }],
       ],
     },  # target_name: message_center_unittests
   ],
 }