Enable ParseHTMLOnMainThread on TOT

third_party/WebKit/Source/core/html/parser/TokenizedChunkQueue.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef TokenizedChunkQueue_h
 #define TokenizedChunkQueue_h
 
 #include "core/html/parser/HTMLDocumentParser.h"
 #include "wtf/Deque.h"
 #include "wtf/PassRefPtr.h"
@@ skipping 23 matching lines @@
   bool enqueue(std::unique_ptr<HTMLDocumentParser::TokenizedChunk>);
   void clear();
 
   void takeAll(Vector<std::unique_ptr<HTMLDocumentParser::TokenizedChunk>>&);
   size_t peakPendingChunkCount();
   size_t peakPendingTokenCount();
 
  private:
   TokenizedChunkQueue();
 
-  std::unique_ptr<Mutex> m_mutex;
   Vector<std::unique_ptr<HTMLDocumentParser::TokenizedChunk>> m_pendingChunks;
   size_t m_peakPendingChunkCount = 0;
   size_t m_peakPendingTokenCount = 0;
   size_t m_pendingTokenCount = 0;
 };
 
 }  // namespace blink
 
 #endif