Extract input_method_whitelist.{h|cc} from c/b/chromeos.

chrome/chrome_browser_extensions.gypi

 # Copyright (c) 2013 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_extensions',
       'type': 'static_library',
       'variables': { 'enable_wexit_time_destructors': 1, },
@@ skipping 723 matching lines @@
         'browser/extensions/window_controller.cc',
         'browser/extensions/window_controller.h',
         'browser/extensions/window_controller_list.cc',
         'browser/extensions/window_controller_list.h',
         'browser/extensions/window_controller_list_observer.h',
       ],
       'conditions': [
         ['chromeos==1', {
           'dependencies': [
             '../build/linux/system.gyp:dbus',
+            '../chromeos/ime/input_method.gyp:gencode',
             '../third_party/libevent/libevent.gyp:libevent',
-            'browser/chromeos/input_method/input_method.gyp:gencode',
             'contacts_proto',
           ],
           'sources!': [
             'browser/extensions/default_apps.cc',
             'browser/extensions/default_apps.h',
           ],
           'sources': [
             'browser/extensions/api/input_ime/input_ime_api.cc',
             'browser/extensions/api/input_ime/input_ime_api.h',
             'browser/extensions/api/rtc_private/rtc_private_api.cc',
@@ skipping 186 matching lines @@
           'variables': {
             'proto_in_dir': 'browser/chromeos/contacts',
             'proto_out_dir': 'chrome/browser/chromeos/contacts',
           },
           'includes': [ '../build/protoc.gypi' ]
         },
       ],
     },],  # 'chromeos=1'
   ],  # 'conditions'
 }