Introduce ServiceWorker.ActivatedWorkerPreparationForMainFrame.Time UMA.

content/content_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.
 
 {
   'dependencies': [
     '../base/base.gyp:base_static',
     '../cc/cc.gyp:cc',
     '../cc/cc.gyp:cc_surfaces',
     '../components/components.gyp:display_compositor',
@@ skipping 1401 matching lines @@
       'browser/safe_util_win.cc',
       'browser/safe_util_win.h',
       'browser/screen_orientation/screen_orientation_delegate_win.cc',
       'browser/screen_orientation/screen_orientation_delegate_win.h',
       'browser/screen_orientation/screen_orientation_dispatcher_host_impl.cc',
       'browser/screen_orientation/screen_orientation_dispatcher_host_impl.h',
       'browser/service_worker/embedded_worker_instance.cc',
       'browser/service_worker/embedded_worker_instance.h',
       'browser/service_worker/embedded_worker_registry.cc',
       'browser/service_worker/embedded_worker_registry.h',
+      'browser/service_worker/embedded_worker_status.h',
       'browser/service_worker/foreign_fetch_request_handler.cc',
       'browser/service_worker/foreign_fetch_request_handler.h',
       'browser/service_worker/link_header_support.cc',
       'browser/service_worker/link_header_support.h',
       'browser/service_worker/service_worker_cache_writer.cc',
       'browser/service_worker/service_worker_cache_writer.h',
       'browser/service_worker/service_worker_client_utils.cc',
       'browser/service_worker/service_worker_client_utils.h',
       'browser/service_worker/service_worker_context_core.cc',
       'browser/service_worker/service_worker_context_core.h',
@@ skipping 774 matching lines @@
       ],
     }],
     ['OS != "mac" and OS != "android"', {
       'sources!': [
         'browser/gpu/gpu_surface_tracker.cc',
         'browser/gpu/gpu_surface_tracker.h',
       ],
     }],
   ],
 }