[scheduler] Use Finch to control background throttling.

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 22 matching lines @@
   void shutdown() override;
   bool shouldYieldForHighPriorityWork() override;
   bool canExceedIdleDeadlineIfRequired() override;
   void postIdleTask(const WebTraceLocation& location,
                     WebThread::IdleTask* task) override;
   void postNonNestableIdleTask(const WebTraceLocation& location,
                                WebThread::IdleTask* task) override;
   WebTaskRunner* loadingTaskRunner() override;
   WebTaskRunner* timerTaskRunner() override;
   std::unique_ptr<WebViewScheduler> createWebViewScheduler(
-      InterventionReporter*) override;
+      InterventionReporter*,
+      WebViewScheduler::WebViewSchedulerSettings*) override;
   void suspendTimerQueue() override {}
   void resumeTimerQueue() override {}
   void addPendingNavigation(WebScheduler::NavigatingFrameType type) override {}
   void removePendingNavigation(
       WebScheduler::NavigatingFrameType type) override {}
   void onNavigationStarted() override {}
 
  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_