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

Source/core/html/parser/HTMLEntitySearch.h

 /*
  * Copyright (C) 2010 Google, Inc. All Rights Reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
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  * 1. Redistributions of source code must retain the above copyright
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  * 2. Redistributions in binary form must reproduce the above copyright
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  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
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 #ifndef HTMLEntitySearch_h
 #define HTMLEntitySearch_h
 
+#include "wtf/Allocator.h"
 #include "wtf/text/WTFString.h"
 
 namespace blink {
 
 struct HTMLEntityTableEntry;
 
 class HTMLEntitySearch {
+    STACK_ALLOCATED();
 public:
     HTMLEntitySearch();
 
     void advance(UChar);
 
     bool isEntityPrefix() const { return !!m_first; }
     int currentLength() const { return m_currentLength; }
 
     const HTMLEntityTableEntry* mostRecentMatch() const { return m_mostRecentMatch; }
 
@@ skipping 17 matching lines @@
     int m_currentLength;
 
     const HTMLEntityTableEntry* m_mostRecentMatch;
     const HTMLEntityTableEntry* m_first;
     const HTMLEntityTableEntry* m_last;
 };
 
 }
 
 #endif