Implement InstanceID API functions.

chrome/chrome_tests.gypi

 # Copyright 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.
 {
   'variables': {
     'chrome_browser_extensions_test_support_sources': [
       # A list of sources which is shared between different browser tests.
       'browser/apps/app_browsertest_util.cc',
       'browser/apps/app_browsertest_util.h',
       'browser/extensions/browsertest_util.cc',
@@ skipping 148 matching lines @@
       'browser/extensions/api/gcm/gcm_apitest.cc',
       'browser/extensions/api/history/history_apitest.cc',
       'browser/extensions/api/hotword_private/hotword_private_apitest.cc',
       'browser/extensions/api/i18n/i18n_apitest.cc',
       'browser/extensions/api/identity/identity_apitest.cc',
       'browser/extensions/api/idltest/idltest_apitest.cc',
       'browser/extensions/api/image_writer_private/image_writer_private_apitest.cc',
       'browser/extensions/api/image_writer_private/test_utils.cc',
       'browser/extensions/api/inline_install_private/inline_install_private_apitest.cc',
       'browser/extensions/api/input_ime/input_ime_apitest_chromeos.cc',
+      'browser/extensions/api/instance_id/instance_id_apitest.cc',
       'browser/extensions/api/log_private/log_private_apitest_chromeos.cc',
       'browser/extensions/api/management/management_api_browsertest.cc',
       'browser/extensions/api/management/management_apitest.cc',
       'browser/extensions/api/management/management_browsertest.cc',
       'browser/extensions/api/mdns/mdns_apitest.cc',
       'browser/extensions/api/media_galleries/media_galleries_apitest.cc',
       'browser/extensions/api/media_galleries/media_galleries_watch_apitest.cc',
       'browser/extensions/api/messaging/native_messaging_apitest.cc',
       'browser/extensions/api/metrics_private/metrics_apitest.cc',
       'browser/extensions/api/module/module_apitest.cc',
@@ skipping 3072 matching lines @@
             ['enable_webrtc==1', {
               'dependencies': [
                 '../third_party/libjingle/libjingle.gyp:libjingle_webrtc'
               ]
             }],
           ],
         }]
     }],
   ],  # 'conditions'
 }