Remove --enablde-drive-v2-api flag.

chrome/chrome_browser.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': [
     {
       'target_name': 'browser',
       'type': 'static_library',
       'variables': { 'enable_wexit_time_destructors': 1, },
@@ skipping 632 matching lines @@
         'browser/drive/drive_api_service.h',
         'browser/drive/drive_api_util.cc',
         'browser/drive/drive_api_util.h',
         'browser/drive/drive_notification_manager.cc',
         'browser/drive/drive_notification_manager.h',
         'browser/drive/drive_notification_manager_factory.cc',
         'browser/drive/drive_notification_manager_factory.h',
         'browser/drive/drive_notification_observer.h',
         'browser/drive/drive_service_interface.cc',
         'browser/drive/drive_service_interface.h',
-        'browser/drive/drive_switches.cc',
-        'browser/drive/drive_switches.h',
         'browser/drive/drive_uploader.cc',
         'browser/drive/drive_uploader.h',
         'browser/drive/event_logger.cc',
         'browser/drive/event_logger.h',
         'browser/drive/gdata_wapi_service.cc',
         'browser/drive/gdata_wapi_service.h',
         'browser/enumerate_modules_model_win.cc',
         'browser/enumerate_modules_model_win.h',
         'browser/extensions/signin/gaia_auth_extension_loader.cc',
         'browser/extensions/signin/gaia_auth_extension_loader.h',
@@ skipping 3077 matching lines @@
             'package_name': 'org/chromium/chrome/browser/ui/toolbar',
             'template_deps': ['browser/ui/toolbar/toolbar_model_security_level_list.h'],
           },
           'includes': [ '../build/android/java_cpp_template.gypi' ],
         },
       ],
      },
     ],
   ],
 }