Remove unused includes from core/html .cpp files

Source/core/html/parser/HTMLDocumentParser.cpp

 /*
  * 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 22 matching lines @@
 #include "core/html/parser/AtomicHTMLToken.h"
 #include "core/html/parser/BackgroundHTMLParser.h"
 #include "core/html/parser/CompactHTMLToken.h"
 #include "core/html/parser/HTMLIdentifier.h"
 #include "core/html/parser/HTMLParserScheduler.h"
 #include "core/html/parser/HTMLParserThread.h"
 #include "core/html/parser/HTMLPreloadScanner.h"
 #include "core/html/parser/HTMLScriptRunner.h"
 #include "core/html/parser/HTMLTokenizer.h"
 #include "core/html/parser/HTMLTreeBuilder.h"
-#include "core/html/parser/NestingLevelIncrementer.h"
 #include "core/inspector/InspectorInstrumentation.h"
-#include "core/loader/DocumentLoader.h"
-#include "core/page/ContentSecurityPolicy.h"
 #include "core/page/Frame.h"
-#include "core/page/Settings.h"
 #include <wtf/Functional.h>
 
 namespace WebCore {
 
 using namespace HTMLNames;
 
 // This is a direct transcription of step 4 from:
 // http://www.whatwg.org/specs/web-apps/current-work/multipage/the-end.html#fragment-case
 static HTMLTokenizer::State tokenizerStateForContextElement(Element* contextElement, bool reportErrors, const HTMLParserOptions& options)
 {
@@ skipping 877 matching lines @@
         m_parserScheduler->suspend();
 }
 
 void HTMLDocumentParser::resumeScheduledTasks()
 {
     if (m_parserScheduler)
         m_parserScheduler->resume();
 }
 
 }