Make classes and structures in core/style, core/plugins and core/streams fast-allocated.

Source/core/style/FillLayer.h

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  *           (C) 2000 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *
  * 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
@@ skipping 13 matching lines @@
 
 #ifndef FillLayer_h
 #define FillLayer_h
 
 #include "core/CoreExport.h"
 #include "core/style/ComputedStyleConstants.h"
 #include "core/style/StyleImage.h"
 #include "platform/Length.h"
 #include "platform/LengthSize.h"
 #include "platform/graphics/GraphicsTypes.h"
+#include "wtf/Allocator.h"
 #include "wtf/RefPtr.h"
 
 namespace blink {
 
 struct FillSize {
+    STACK_ALLOCATED();
     FillSize()
         : type(SizeLength)
     {
     }
 
     FillSize(EFillSizeType t, const LengthSize& l)
         : type(t)
         , size(l)
     {
     }
@@ skipping 197 matching lines @@
 
     mutable unsigned m_thisOrNextLayersClipMax : 2; // EFillBox, maximum m_clip value from this to bottom layer
     mutable unsigned m_thisOrNextLayersUseContentBox : 1; // True if any of this or subsequent layers has content-box clip or origin.
     mutable unsigned m_thisOrNextLayersHaveLocalAttachment : 1; // True if any of this or subsequent layers has local attachment.
     mutable unsigned m_cachedPropertiesComputed : 1; // Set once any of the above is accessed. The layers will be frozen thereafter.
 };
 
 } // namespace blink
 
 #endif // FillLayer_h