[Blink>Media] Moving autoplay logic to AutoplayPolicy

third_party/WebKit/Source/core/html/media/AutoplayUmaHelper.h

 // Copyright 2016 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 AutoplayUmaHelper_h
 #define AutoplayUmaHelper_h
 
 #include "core/CoreExport.h"
 #include "core/dom/ContextLifecycleObserver.h"
 #include "core/events/EventListener.h"
@@ skipping 57 matching lines @@
 
   bool operator==(const EventListener&) const override;
 
   void ContextDestroyed(ExecutionContext*) override;
 
   void OnAutoplayInitiated(AutoplaySource);
 
   void RecordCrossOriginAutoplayResult(CrossOriginAutoplayResult);
   void RecordAutoplayUnmuteStatus(AutoplayUnmuteActionStatus);
 
+  void VideoWillBeDrawnToCanvas();
   void DidMoveToNewDocument(Document& old_document);
 
   bool IsVisible() const { return is_visible_; }
 
   bool HasSource() const { return !sources_.empty(); }
 
   DECLARE_VIRTUAL_TRACE();
 
  private:
   friend class MockAutoplayUmaHelper;
@@ skipping 53 matching lines @@
   // The observer is used to observer an autoplaying muted video changing it's
   // visibility, which is used for offscreen duration UMA.  The UMA is pending
   // for recording as long as this observer is non-null.
   Member<ElementVisibilityObserver>
       muted_video_offscreen_duration_visibility_observer_;
 };
 
 }  // namespace blink
 
 #endif  // AutoplayUmaHelper_h