Revert of Put the BackgroundHTMLParser on oilpan heap

third_party/WebKit/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
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  * 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 HTMLDocumentParser_h
 #define HTMLDocumentParser_h
 
-#include <memory>
 #include "core/CoreExport.h"
 #include "core/dom/ParserContentPolicy.h"
 #include "core/dom/ScriptableDocumentParser.h"
 #include "core/html/parser/BackgroundHTMLInputStream.h"
 #include "core/html/parser/HTMLInputStream.h"
 #include "core/html/parser/HTMLParserOptions.h"
 #include "core/html/parser/HTMLParserReentryPermit.h"
 #include "core/html/parser/HTMLParserScriptRunnerHost.h"
 #include "core/html/parser/HTMLPreloadScanner.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"
 #include "core/html/parser/ParserSynchronizationPolicy.h"
 #include "core/html/parser/PreloadRequest.h"
 #include "core/html/parser/TextResourceDecoder.h"
 #include "core/html/parser/XSSAuditor.h"
 #include "core/html/parser/XSSAuditorDelegate.h"
 #include "wtf/Deque.h"
 #include "wtf/RefPtr.h"
 #include "wtf/WeakPtr.h"
 #include "wtf/text/TextPosition.h"
+#include <memory>
 
 namespace blink {
 
 class BackgroundHTMLParser;
 class CompactHTMLToken;
 class Document;
 class DocumentEncodingData;
 class DocumentFragment;
 class Element;
 class HTMLDocument;
 class HTMLParserScheduler;
 class HTMLParserScriptRunner;
 class HTMLPreloadScanner;
 class HTMLResourcePreloader;
 class HTMLTreeBuilder;
 class SegmentedString;
 class TokenizedChunkQueue;
 class DocumentWriteEvaluator;
 
 class CORE_EXPORT HTMLDocumentParser : public ScriptableDocumentParser,
                                        private HTMLParserScriptRunnerHost {
   USING_GARBAGE_COLLECTED_MIXIN(HTMLDocumentParser);
+  USING_PRE_FINALIZER(HTMLDocumentParser, dispose);
 
  public:
   static HTMLDocumentParser* create(
       HTMLDocument& document,
       ParserSynchronizationPolicy backgroundParsingPolicy) {
     return new HTMLDocumentParser(document, backgroundParsingPolicy);
   }
   ~HTMLDocumentParser() override;
   DECLARE_VIRTUAL_TRACE();
 
+  // TODO(alexclarke): Remove when background parser goes away.
+  void dispose();
+
   // Exposed for HTMLParserScheduler
   void resumeParsingAfterYield();
 
   static void parseDocumentFragment(
       const String&,
       DocumentFragment*,
       Element* contextElement,
       ParserContentPolicy = AllowScriptingContent);
 
   // Exposed for testing.
@@ skipping 34 matching lines @@
 
     static constexpr int noPendingToken = -1;
   };
   void notifyPendingTokenizedChunks();
   void didReceiveEncodingDataFromBackgroundParser(const DocumentEncodingData&);
 
   void appendBytes(const char* bytes, size_t length) override;
   void flush() final;
   void setDecoder(std::unique_ptr<TextResourceDecoder>) final;
 
-  TokenizedChunkQueue* tokenizedChunkQueue() {
-    return m_tokenizedChunkQueue.get();
-  }
-
  protected:
   void insert(const SegmentedString&) final;
   void append(const String&) override;
   void finish() final;
 
   HTMLDocumentParser(HTMLDocument&, ParserSynchronizationPolicy);
   HTMLDocumentParser(DocumentFragment*,
                      Element* contextElement,
                      ParserContentPolicy);
 
@@ skipping 30 matching lines @@
 
   // HTMLParserScriptRunnerHost
   void notifyScriptLoaded(PendingScript*) final;
   HTMLInputStream& inputStream() final { return m_input; }
   bool hasPreloadScanner() const final {
     return m_preloadScanner.get() && !shouldUseThreading();
   }
   void appendCurrentInputStreamToPreloadScannerAndScan() final;
 
   void startBackgroundParser();
+  void stopBackgroundParser();
   void validateSpeculations(std::unique_ptr<TokenizedChunk> lastChunk);
   void discardSpeculationsAndResumeFrom(
       std::unique_ptr<TokenizedChunk> lastChunk,
       std::unique_ptr<HTMLToken>,
       std::unique_ptr<HTMLTokenizer>);
   size_t processTokenizedChunkFromBackgroundParser(
       std::unique_ptr<TokenizedChunk>);
   void pumpPendingSpeculations();
 
   bool canTakeNextToken();
@@ skipping 37 matching lines @@
 
   std::unique_ptr<HTMLToken> m_token;
   std::unique_ptr<HTMLTokenizer> m_tokenizer;
   Member<HTMLParserScriptRunner> m_scriptRunner;
   Member<HTMLTreeBuilder> m_treeBuilder;
 
   std::unique_ptr<HTMLPreloadScanner> m_preloadScanner;
   // A scanner used only for input provided to the insert() method.
   std::unique_ptr<HTMLPreloadScanner> m_insertionPreloadScanner;
 
+  RefPtr<WebTaskRunner> m_loadingTaskRunner;
   Member<HTMLParserScheduler> m_parserScheduler;
   HTMLSourceTracker m_sourceTracker;
   TextPosition m_textPosition;
   XSSAuditor m_xssAuditor;
   XSSAuditorDelegate m_xssAuditorDelegate;
 
   // FIXME: m_lastChunkBeforePause, m_tokenizer, m_token, and m_input should be
   // combined into a single state object so they can be set and cleared together
   // and passed between threads together.
   std::unique_ptr<TokenizedChunk> m_lastChunkBeforePause;
   Deque<std::unique_ptr<TokenizedChunk>> m_speculations;
-  Member<BackgroundHTMLParser> m_backgroundParser;
+  WeakPtrFactory<HTMLDocumentParser> m_weakFactory;
+  WeakPtr<BackgroundHTMLParser> m_backgroundParser;
   Member<HTMLResourcePreloader> m_preloader;
   PreloadRequestStream m_queuedPreloads;
   Vector<String> m_queuedDocumentWriteScripts;
   RefPtr<TokenizedChunkQueue> m_tokenizedChunkQueue;
   std::unique_ptr<DocumentWriteEvaluator> m_evaluator;
 
   // If this is non-null, then there is a meta CSP token somewhere in the
   // speculation buffer. Preloads will be deferred until a token matching this
   // pointer is parsed and the CSP policy is applied. Note that this pointer
   // tracks the *last* meta token in the speculation buffer, so it overestimates
   // how long to defer preloads. This is for simplicity, as the alternative
   // would require keeping track of token positions of preload requests.
   CompactHTMLToken* m_pendingCSPMetaToken;
 
   TaskHandle m_resumeParsingTaskHandle;
 
   bool m_shouldUseThreading;
   bool m_endWasDelayed;
+  bool m_haveBackgroundParser;
   bool m_tasksWereSuspended;
   unsigned m_pumpSessionNestingLevel;
   unsigned m_pumpSpeculationsSessionNestingLevel;
   bool m_isParsingAtLineNumber;
   bool m_triedLoadingLinkHeaders;
   bool m_addedPendingStylesheetInBody;
   bool m_isWaitingForStylesheets;
 };
 
 }  // namespace blink
 
 #endif  // HTMLDocumentParser_h