Make classes and structures in core/paint fast-allocated.

Source/core/paint/LayerClipRecorder.h

 // Copyright 2014 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 LayerClipRecorder_h
 #define LayerClipRecorder_h
 
 #include "core/CoreExport.h"
 #include "core/paint/DeprecatedPaintLayerPaintingInfo.h"
 #include "core/paint/PaintPhase.h"
 #include "platform/graphics/paint/ClipDisplayItem.h"
 #include "platform/graphics/paint/DisplayItem.h"
 #include "wtf/Vector.h"
 
 namespace blink {
 
 class ClipRect;
 class GraphicsContext;
 class LayoutBoxModelObject;
 
 class CORE_EXPORT LayerClipRecorder {
+    WTF_MAKE_FAST_ALLOCATED(LayerClipRecorder);
 public:
 
     enum BorderRadiusClippingRule { IncludeSelfForBorderRadius, DoNotIncludeSelfForBorderRadius };
 
     // Set rounded clip rectangles defined by border radii all the way from the DeprecatedPaintLayerPaintingInfo
     // "root" layer down to the specified layer (or the parent of said layer, in case
     // BorderRadiusClippingRule says to skip self). fragmentOffset is used for multicol, to specify
     // the translation required to get from flow thread coordinates to visual coordinates for a
     // certain column.
     // FIXME: The BorderRadiusClippingRule parameter is really useless now. If we want to skip self,
@@ skipping 12 matching lines @@
         BorderRadiusClippingRule, Vector<FloatRoundedRect>& roundedRectClips);
 
     GraphicsContext& m_graphicsContext;
     const LayoutBoxModelObject& m_layoutObject;
     DisplayItem::Type m_clipType;
 };
 
 } // namespace blink
 
 #endif // LayerClipRecorder_h