Add dummy implementation of about_flags for Android.

chrome/chrome_browser.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',
       'type': 'static_library',
@@ skipping 80 matching lines @@
       },
       'export_dependent_settings': [
         '../sync/sync.gyp:sync_notifier',
       ],
       'sources': [
         # All .cc, .h, .m, and .mm files under browser except for:
         # * tests and mocks.
         # * code below browser/extensions
         'browser/about_flags.cc',
         'browser/about_flags.h',
+        'browser/about_flags_android.cc',
         'browser/accessibility/accessibility_extension_api_constants.cc',
         'browser/accessibility/accessibility_extension_api_constants.h',
         'browser/accessibility/accessibility_events.cc',
         'browser/accessibility/accessibility_events.h',
         'browser/accessibility/invert_bubble_prefs.cc',
         'browser/accessibility/invert_bubble_prefs.h',
         'browser/android/chrome_startup_flags.cc',
         'browser/android/chrome_startup_flags.h',
         'browser/alternate_nav_url_fetcher.cc',
         'browser/alternate_nav_url_fetcher.h',
@@ skipping 5250 matching lines @@
         'browser/metrics/proto/study.proto',
       ],
       'variables': {
         'proto_in_dir': 'browser/metrics/proto',
         'proto_out_dir': 'chrome/browser/metrics/proto',
       },
       'includes': [ '../build/protoc.gypi' ]
     },
   ],
 }