scheduler: Always create a real scheduler in unit tests

components/scheduler/scheduler.gypi

 # Copyright 2015 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': {
     'scheduler_common_sources': [
       'common/scheduler_switches.cc',
       'common/scheduler_switches.h',
     ],
@@ skipping 26 matching lines @@
       'child/webthread_base.cc',
       'child/webthread_base.h',
       'child/webthread_impl_for_worker_scheduler.cc',
       'child/webthread_impl_for_worker_scheduler.h',
       'child/worker_scheduler.cc',
       'child/worker_scheduler.h',
       'child/worker_scheduler_impl.cc',
       'child/worker_scheduler_impl.h',
       'renderer/deadline_task_runner.cc',
       'renderer/deadline_task_runner.h',
+      'renderer/lazy_scheduler_message_loop_delegate.cc',
+      'renderer/lazy_scheduler_message_loop_delegate.h',

[rmcilroy, 2015/06/02 16:53:07]

Could we have this as a separate component (or something similar) which is only
depended on by content_tests to avoid compiling it into Chrome itself?

[Sami, 2015/06/02 17:26:21]

Good idea! I've now made an attempt of doing that.

       'renderer/null_renderer_scheduler.cc',
       'renderer/null_renderer_scheduler.h',
       'renderer/renderer_scheduler.cc',
       'renderer/renderer_scheduler.h',
       'renderer/renderer_scheduler_impl.cc',
       'renderer/renderer_scheduler_impl.h',
       'renderer/renderer_web_scheduler_impl.cc',
       'renderer/renderer_web_scheduler_impl.h',
       'renderer/webthread_impl_for_renderer_scheduler.cc',
       'renderer/webthread_impl_for_renderer_scheduler.h',
       'scheduler_export.h',
     ],
   },
 }