Count usage of the obsolete 'isindex' element.

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 11 matching lines @@
  * (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 HTMLDocumentParser_h
 #define HTMLDocumentParser_h
 
 #include "core/dom/ParserContentPolicy.h"
 #include "core/dom/ScriptableDocumentParser.h"
 #include "core/fetch/ResourceClient.h"
+#include "core/frame/UseCounter.h"
 #include "core/html/parser/BackgroundHTMLInputStream.h"
 #include "core/html/parser/CompactHTMLToken.h"
 #include "core/html/parser/HTMLInputStream.h"
 #include "core/html/parser/HTMLParserOptions.h"
 #include "core/html/parser/HTMLPreloadScanner.h"
 #include "core/html/parser/HTMLScriptRunnerHost.h"
 #include "core/html/parser/HTMLSourceTracker.h"
 #include "core/html/parser/HTMLToken.h"
 #include "core/html/parser/HTMLTokenizer.h"
 #include "core/html/parser/HTMLTreeBuilderSimulator.h"
@@ skipping 47 matching lines @@
         OwnPtr<CompactHTMLTokenStream> tokens;
         PreloadRequestStream preloads;
         XSSInfoStream xssInfos;
         HTMLTokenizer::State tokenizerState;
         HTMLTreeBuilderSimulator::State treeBuilderState;
         HTMLInputCheckpoint inputCheckpoint;
         TokenPreloadScannerCheckpoint preloadScannerCheckpoint;
     };
     void didReceiveParsedChunkFromBackgroundParser(PassOwnPtr<ParsedChunk>);
 
+    UseCounter* useCounter() { return UseCounter::getFrom(contextForParsingSession()); }
+
 protected:
     virtual void insert(const SegmentedString&) OVERRIDE;
     virtual void append(PassRefPtr<StringImpl>) OVERRIDE;
     virtual void finish() OVERRIDE;
 
     HTMLDocumentParser(HTMLDocument*, bool reportErrors);
     HTMLDocumentParser(DocumentFragment*, Element* contextElement, ParserContentPolicy);
 
     HTMLTreeBuilder* treeBuilder() const { return m_treeBuilder.get(); }
 
@@ skipping 87 matching lines @@
 
     bool m_isPinnedToMainThread;
     bool m_endWasDelayed;
     bool m_haveBackgroundParser;
     unsigned m_pumpSessionNestingLevel;
 };
 
 }
 
 #endif