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

Source/core/layout/LayoutTreeAsText.h

 /*
  * Copyright (C) 2003, 2006, 2008 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 10 matching lines @@
  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef LayoutTreeAsText_h
 #define LayoutTreeAsText_h
 
 #include "core/CoreExport.h"
 #include "platform/text/TextStream.h"
+#include "wtf/Allocator.h"
 #include "wtf/Forward.h"
 
 namespace blink {
 
 class Color;
 class DeprecatedPaintLayer;
 class Element;
 class LayoutRect;
 class LocalFrame;
 class Node;
@@ skipping 14 matching lines @@
     LayoutAsTextShowLineTrees = 1 << 8 // Dump the line trees for each LayoutBlockFlow.
 };
 typedef unsigned LayoutAsTextBehavior;
 
 // You don't need pageWidthInPixels if you don't specify LayoutAsTextInPrintingMode.
 CORE_EXPORT String externalRepresentation(LocalFrame*, LayoutAsTextBehavior = LayoutAsTextBehaviorNormal);
 CORE_EXPORT String externalRepresentation(Element*, LayoutAsTextBehavior = LayoutAsTextBehaviorNormal);
 void write(TextStream&, const LayoutObject&, int indent = 0, LayoutAsTextBehavior = LayoutAsTextBehaviorNormal);
 
 class LayoutTreeAsText {
+    STATIC_ONLY(LayoutTreeAsText);
 // FIXME: This is a cheesy hack to allow easy access to ComputedStyle colors.  It won't be needed if we convert
 // it to use visitedDependentColor instead. (This just involves rebaselining many results though, so for now it's
 // not being done).
 public:
 static void writeLayoutObject(TextStream&, const LayoutObject&, LayoutAsTextBehavior);
 static void writeLayers(TextStream&, const DeprecatedPaintLayer* rootLayer, DeprecatedPaintLayer*, const LayoutRect& paintDirtyRect, int indent = 0, LayoutAsTextBehavior = LayoutAsTextBehaviorNormal);
 static void writeLineBoxTree(TextStream&, const LayoutBlockFlow&, int indent = 0);
 };
 
 // Helper function shared with SVGLayoutTreeAsText
 String quoteAndEscapeNonPrintables(const String&);
 
 CORE_EXPORT String counterValueForElement(Element*);
 
 CORE_EXPORT String markerTextForListItem(Element*);
 
 CORE_EXPORT String nodePositionAsStringForTesting(Node*);
 
 TextStream& operator<<(TextStream&, const Color&);
 
 } // namespace blink
 
 #endif // LayoutTreeAsText_h