chrome/blink: Add functionality for in-product help for media elements.

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

 // Copyright 2017 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 MediaControls_h
 #define MediaControls_h
 
 #include "core/CoreExport.h"
 #include "platform/heap/Handle.h"
 #include "platform/heap/Visitor.h"
 
 namespace blink {
 
 class Document;
 class HTMLDivElement;
 class HTMLMediaElement;
+class IntRect;
 class LayoutObject;
 class ShadowRoot;
 
 // MediaControls is an interface to abstract the HTMLMediaElement controls. The
 // implementation will be used using a Factory (see below).
 class CORE_EXPORT MediaControls : public GarbageCollectedMixin {
  public:
   // Factory class that HTMLMediaElement uses to create the MediaControls
   // instance. MediaControls implementations are expected to implement a factory
   // class and provide an implementation of it to HTMLMediaElement via
@@ skipping 35 matching lines @@
   // TODO(mlamouri): required by LayoutVTTCue.
   virtual LayoutObject* ContainerLayoutObject() = 0;
 
   // TODO: the following are required by other parts of the media controls
   // implementation and could be removed when the full implementation has moved
   // to modules.
   virtual HTMLDivElement* PanelElement() = 0;
   virtual Document& OwnerDocument() = 0;
   virtual void OnMediaControlsEnabledChange() = 0;
 
+  virtual bool GetDownloadButtonRect(IntRect&) = 0;
+  virtual void IPHDisabled() = 0;
+
   DECLARE_VIRTUAL_TRACE();
 
  private:
   Member<HTMLMediaElement> media_element_;
 };
 
 }  // namespace blink
 
 #endif  // MediaControls_h