[scheduler] Use Finch to control background throttling.

third_party/WebKit/Source/platform/testing/TestingPlatformSupport.h

 /*
  * Copyright (C) 2014 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 83 matching lines @@
   // WebScheduler implementation:
   WebTaskRunner* loadingTaskRunner() override;
   WebTaskRunner* timerTaskRunner() override;
   void shutdown() override {}
   bool shouldYieldForHighPriorityWork() override { return false; }
   bool canExceedIdleDeadlineIfRequired() override { return false; }
   void postIdleTask(const WebTraceLocation&, WebThread::IdleTask*) override {}
   void postNonNestableIdleTask(const WebTraceLocation&,
                                WebThread::IdleTask*) override {}
   std::unique_ptr<WebViewScheduler> createWebViewScheduler(
-      InterventionReporter*) override {
+      InterventionReporter*,
+      WebViewScheduler::WebViewSchedulerSettings*) override {
     return nullptr;
   }
   void suspendTimerQueue() override {}
   void resumeTimerQueue() override {}
   void addPendingNavigation(WebScheduler::NavigatingFrameType) override {}
   void removePendingNavigation(WebScheduler::NavigatingFrameType) override {}
   void onNavigationStarted() override {}
 
  private:
   WTF::Deque<std::unique_ptr<WebTaskRunner::Task>> m_tasks;
@@ skipping 94 matching lines @@
       m_discardableMemoryAllocator;
   std::unique_ptr<DummyPlatform> m_platform;
   std::unique_ptr<cc_blink::WebCompositorSupportImpl> m_compositorSupport;
   TestingPlatformSupport::Config m_testingPlatformConfig;
   std::unique_ptr<TestingPlatformSupport> m_testingPlatformSupport;
 };
 
 }  // namespace blink
 
 #endif  // TestingPlatformSupport_h