Enable MQ evaluation off the main thread

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
  *    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.
  */
 
 #include "config.h"
 #include "core/html/parser/HTMLDocumentParser.h"
 
 #include "HTMLNames.h"
+#include "core/css/MediaQueryEvaluator.h"
 #include "core/dom/DocumentFragment.h"
 #include "core/dom/Element.h"
 #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"
@@ skipping 431 matching lines @@
 
     InspectorInstrumentation::didWriteHTML(cookie, lineNumber().zeroBasedInt());
 }
 
 void HTMLDocumentParser::forcePlaintextForTextDocument()
 {
     if (shouldUseThreading()) {
         // This method is called before any data is appended, so we have to start
         // the background parser ourselves.
         if (!m_haveBackgroundParser)
-            startBackgroundParser();
+            startBackgroundParser(MediaValues::create(document()));
 
         HTMLParserThread::shared()->postTask(bind(&BackgroundHTMLParser::forcePlaintextForTextDocument, m_backgroundParser));
     } else
         m_tokenizer->setState(HTMLTokenizer::PLAINTEXTState);
 }
 
 Document* HTMLDocumentParser::contextForParsingSession()
 {
     // The parsing session should interact with the document only when parsing
     // non-fragments. Otherwise, we might delay the load event mistakenly.
@@ skipping 49 matching lines @@
 
     if (isStopped())
         return;
 
     if (session.needsYield)
         m_parserScheduler->scheduleForResume();
 
     if (isWaitingForScripts()) {
         ASSERT(m_tokenizer->state() == HTMLTokenizer::DataState);
         if (!m_preloadScanner) {
-            m_preloadScanner = adoptPtr(new HTMLPreloadScanner(m_options, document()->url()));
+            m_preloadScanner = adoptPtr(new HTMLPreloadScanner(m_options, document()->url(), MediaValues::create(document())));
             m_preloadScanner->appendToEnd(m_input.current());
         }
         m_preloadScanner->scan(m_preloader.get(), document()->baseElementURL());
     }
 
     InspectorInstrumentation::didWriteHTML(cookie, m_input.current().currentLine().zeroBasedInt());
 }
 
 void HTMLDocumentParser::constructTreeFromHTMLToken(HTMLToken& rawToken)
 {
@@ skipping 54 matching lines @@
 
     SegmentedString excludedLineNumberSource(source);
     excludedLineNumberSource.setExcludeLineNumbers();
     m_input.insertAtCurrentInsertionPoint(excludedLineNumberSource);
     pumpTokenizerIfPossible(ForceSynchronous);
 
     if (isWaitingForScripts()) {
         // Check the document.write() output with a separate preload scanner as
         // the main scanner can't deal with insertions.
         if (!m_insertionPreloadScanner)
-            m_insertionPreloadScanner = adoptPtr(new HTMLPreloadScanner(m_options, document()->url()));
+            m_insertionPreloadScanner = adoptPtr(new HTMLPreloadScanner(m_options, document()->url(), MediaValues::create(document())));
         m_insertionPreloadScanner->appendToEnd(source);
         m_insertionPreloadScanner->scan(m_preloader.get(), document()->baseElementURL());
     }
 
     endIfDelayed();
 }
 
-void HTMLDocumentParser::startBackgroundParser()
+void HTMLDocumentParser::startBackgroundParser(PassRefPtr<MediaValues> mediaValues)
 {
     ASSERT(shouldUseThreading());
     ASSERT(!m_haveBackgroundParser);
     m_haveBackgroundParser = true;
 
     HTMLIdentifier::init();
 
     RefPtr<WeakReference<BackgroundHTMLParser> > reference = WeakReference<BackgroundHTMLParser>::createUnbound();
     m_backgroundParser = WeakPtr<BackgroundHTMLParser>(reference);
 
     OwnPtr<BackgroundHTMLParser::Configuration> config = adoptPtr(new BackgroundHTMLParser::Configuration);
     config->options = m_options;
     config->parser = m_weakFactory.createWeakPtr();
     config->xssAuditor = adoptPtr(new XSSAuditor);
     config->xssAuditor->init(document(), &m_xssAuditorDelegate);
-    config->preloadScanner = adoptPtr(new TokenPreloadScanner(document()->url().copy()));
+    config->preloadScanner = adoptPtr(new TokenPreloadScanner(document()->url().copy(), mediaValues));
 
     ASSERT(config->xssAuditor->isSafeToSendToAnotherThread());
     ASSERT(config->preloadScanner->isSafeToSendToAnotherThread());
     HTMLParserThread::shared()->postTask(bind(&BackgroundHTMLParser::create, reference.release(), config.release()));
 }
 
 void HTMLDocumentParser::stopBackgroundParser()
 {
     ASSERT(shouldUseThreading());
     ASSERT(m_haveBackgroundParser);
     m_haveBackgroundParser = false;
 
     HTMLParserThread::shared()->postTask(bind(&BackgroundHTMLParser::stop, m_backgroundParser));
     m_weakFactory.revokeAll();
 }
 
 void HTMLDocumentParser::append(PassRefPtr<StringImpl> inputSource)
 {
     if (isStopped())
         return;
 
     if (shouldUseThreading()) {
-        if (!m_haveBackgroundParser)
-            startBackgroundParser();
+        if (!m_haveBackgroundParser) {
+            startBackgroundParser(MediaValues::create(document()));
+        }
 
         ASSERT(inputSource->hasOneRef());
         Closure closure = bind(&BackgroundHTMLParser::append, m_backgroundParser, String(inputSource));
         // NOTE: Important that the String temporary is destroyed before we post the task
         // otherwise the String could call deref() on a StringImpl now owned by the background parser.
         // We would like to ASSERT(closure.arg3()->hasOneRef()) but sadly the args are private.
         HTMLParserThread::shared()->postTask(closure);
         return;
     }
 
@@ skipping 246 matching lines @@
         m_parserScheduler->suspend();
 }
 
 void HTMLDocumentParser::resumeScheduledTasks()
 {
     if (m_parserScheduler)
         m_parserScheduler->resume();
 }
 
 }