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

third_party/WebKit/Source/core/page/ChromeClient.h

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple, Inc. All rights
  * reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
  * Copyright (C) 2012 Samsung Electronics. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 27 matching lines @@
 #include "platform/graphics/TouchAction.h"
 #include "platform/heap/Handle.h"
 #include "platform/scroll/ScrollTypes.h"
 #include "platform/wtf/Forward.h"
 #include "platform/wtf/Optional.h"
 #include "platform/wtf/Vector.h"
 #include "public/platform/BlameContext.h"
 #include "public/platform/WebDragOperation.h"
 #include "public/platform/WebEventListenerProperties.h"
 #include "public/platform/WebFocusType.h"
+#include "public/web/WebMediaIPH.h"
 
 // To avoid conflicts with the CreateWindow macro from the Windows SDK...
 #undef CreateWindow
 
 namespace blink {
 
 class ColorChooser;
 class ColorChooserClient;
 class CompositorWorkerProxyClient;
 class CompositorAnimationTimeline;
@@ skipping 298 matching lines @@
   virtual WebLayerTreeView* GetWebLayerTreeView(LocalFrame*) { return nullptr; }
 
   virtual WebLocalFrameBase* GetWebLocalFrameBase(LocalFrame*) {
     return nullptr;
   }
 
   virtual WebRemoteFrameBase* GetWebRemoteFrameBase(RemoteFrame&) {
     return nullptr;
   }
 
+  virtual std::unique_ptr<WebMediaIPH> CreateWebMediaIPH(LocalFrame*) {
+    return nullptr;
+  }
+
   virtual void RequestDecode(
       LocalFrame*,
       const PaintImage& image,
       std::unique_ptr<WTF::Function<void(bool)>> callback) {
     (*callback)(false);
   }
 
   DECLARE_TRACE();
 
  protected:
@@ skipping 23 matching lines @@
   WeakMember<Node> last_mouse_over_node_;
   LayoutPoint last_tool_tip_point_;
   String last_tool_tip_text_;
 
   FRIEND_TEST_ALL_PREFIXES(ChromeClientTest, SetToolTipFlood);
 };
 
 }  // namespace blink
 
 #endif  // ChromeClient_h