Do-not-commit: Count layout tree memory usage

third_party/WebKit/Source/core/layout/LayoutVideo.h

 /*
  * Copyright (C) 2007, 2009, 2010 Apple 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 29 matching lines @@
   static LayoutSize defaultSize();
 
   LayoutRect replacedContentRect() const final;
 
   bool supportsAcceleratedRendering() const;
 
   bool shouldDisplayVideo() const;
   HTMLVideoElement* videoElement() const;
 
   const char* name() const override { return "LayoutVideo"; }
+  char objectSize() const override { return sizeof(this); }
 
  private:
   void updateFromElement() override;
 
   void intrinsicSizeChanged() override;
   LayoutSize calculateIntrinsicSize();
   void updateIntrinsicSize();
 
   void imageChanged(WrappedImagePtr, const IntRect*) override;
 
@@ skipping 21 matching lines @@
   void updatePlayer();
 
   LayoutSize m_cachedImageSize;
 };
 
 DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutVideo, isVideo());
 
 }  // namespace blink
 
 #endif  // LayoutVideo_h