scheduler: Detect load RAIL mode

third_party/WebKit/Source/platform/scheduler/child/web_scheduler_impl.h

 // 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.
 
 #ifndef THIRD_PARTY_WEBKIT_SOURCE_PLATFORM_SCHEDULER_CHILD_WEB_SCHEDULER_IMPL_H_
 #define THIRD_PARTY_WEBKIT_SOURCE_PLATFORM_SCHEDULER_CHILD_WEB_SCHEDULER_IMPL_H_
 
 #include <memory>
 
 #include "base/memory/ref_counted.h"
@@ skipping 28 matching lines @@
                                WebThread::IdleTask* task) override;
   WebTaskRunner* loadingTaskRunner() override;
   WebTaskRunner* timerTaskRunner() override;
   std::unique_ptr<WebViewScheduler> createWebViewScheduler(
       InterventionReporter*) override;
   void suspendTimerQueue() override {}
   void resumeTimerQueue() override {}
   void addPendingNavigation(WebScheduler::NavigatingFrameType type) override {}
   void removePendingNavigation(
       WebScheduler::NavigatingFrameType type) override {}
-  void onNavigationStarted() override {}

[alex clarke (OOO till 29th), 2016/10/11 10:32:50]

Hmm looks like we never got round to using that.  Do you remember what we were
intending to do?

[Sami, 2016/10/12 04:21:40]

IIRC we speculatively added this for doing load time scheduling before we
realized those need to be hooked up from the content layer instead. Doesn't seem
like we need to keep these around anymore.

 
  private:
   static void runIdleTask(std::unique_ptr<WebThread::IdleTask> task,
                           base::TimeTicks deadline);
 
   ChildScheduler* child_scheduler_;  // NOT OWNED
   scoped_refptr<SingleThreadIdleTaskRunner> idle_task_runner_;
   scoped_refptr<TaskQueue> timer_task_runner_;
   std::unique_ptr<WebTaskRunnerImpl> loading_web_task_runner_;
   std::unique_ptr<WebTaskRunnerImpl> timer_web_task_runner_;
 };
 
 }  // namespace scheduler
 }  // namespace blink
 
 #endif  // THIRD_PARTY_WEBKIT_SOURCE_PLATFORM_SCHEDULER_CHILD_WEB_SCHEDULER_IMPL_H_