Remove dependency on cc::TestNowSource from scheduler code

content/content_child.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.
 
 {
   'dependencies': [
     '../base/base.gyp:base',
     '../components/tracing.gyp:tracing',
     '../components/webcrypto/webcrypto.gyp:webcrypto',
     '../mojo/mojo_base.gyp:mojo_environment_chromium',
@@ skipping 191 matching lines @@
       'child/scheduler/prioritizing_task_queue_selector.h',
       'child/scheduler/scheduler_helper.cc',
       'child/scheduler/scheduler_helper.h',
       'child/scheduler/scheduler_message_loop_delegate.cc',
       'child/scheduler/scheduler_message_loop_delegate.h',
       'child/scheduler/single_thread_idle_task_runner.cc',
       'child/scheduler/single_thread_idle_task_runner.h',
       'child/scheduler/task_queue_selector.h',
       'child/scheduler/task_queue_manager.cc',
       'child/scheduler/task_queue_manager.h',
+      'child/scheduler/time_source.cc',
+      'child/scheduler/time_source.h',
       'child/scheduler/webthread_impl_for_worker_scheduler.cc',
       'child/scheduler/webthread_impl_for_worker_scheduler.h',
       'child/scheduler/web_scheduler_impl.cc',
       'child/scheduler/web_scheduler_impl.h',
       'child/scheduler/worker_scheduler.cc',
       'child/scheduler/worker_scheduler.h',
       'child/scheduler/worker_scheduler_impl.cc',
       'child/scheduler/worker_scheduler_impl.h',
       'child/resource_dispatcher.cc',
       'child/resource_dispatcher.h',
@@ skipping 121 matching lines @@
         'child/npapi/webplugin_delegate_impl_mac.mm',
       ],
     }],
     ['OS=="win"', {
       'sources!': [
         'child/npapi/webplugin_delegate_impl_aura.cc',
       ],
     }],
   ],
 }