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

Source/core/html/parser/HTMLDocumentParser.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
  * 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 74 matching lines @@
     HTMLTokenizer* tokenizer() const { return m_tokenizer.get(); }
 
     TextPosition textPosition() const final;
     bool isParsingAtLineNumber() const final;
     OrdinalNumber lineNumber() const final;
 
     void suspendScheduledTasks() final;
     void resumeScheduledTasks() final;
 
     struct ParsedChunk {
+        WTF_MAKE_FAST_ALLOCATED(ParsedChunk);
+    public:
         OwnPtr<CompactHTMLTokenStream> tokens;
         PreloadRequestStream preloads;
         XSSInfoStream xssInfos;
         HTMLTokenizer::State tokenizerState;
         HTMLTreeBuilderSimulator::State treeBuilderState;
         HTMLInputCheckpoint inputCheckpoint;
         TokenPreloadScannerCheckpoint preloadScannerCheckpoint;
         bool startingScript;
     };
     void didReceiveParsedChunkFromBackgroundParser(PassOwnPtr<ParsedChunk>);
@@ skipping 100 matching lines @@
     bool m_haveBackgroundParser;
     bool m_tasksWereSuspended;
     unsigned m_pumpSessionNestingLevel;
     unsigned m_pumpSpeculationsSessionNestingLevel;
     bool m_isParsingAtLineNumber;
 };
 
 }
 
 #endif