Enable Media query evaluation in the preload scanner

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
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  * 2. Redistributions in binary form must reproduce the above copyright
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  *    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
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  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 #include "config.h"
 #include "core/html/parser/HTMLDocumentParser.h"
 
 #include "HTMLNames.h"
+#include "core/css/MediaValues.h"
 #include "core/dom/DocumentFragment.h"
 #include "core/dom/Element.h"
 #include "core/frame/LocalFrame.h"
 #include "core/html/HTMLDocument.h"
 #include "core/html/parser/AtomicHTMLToken.h"
 #include "core/html/parser/BackgroundHTMLParser.h"
 #include "core/html/parser/HTMLParserScheduler.h"
 #include "core/html/parser/HTMLParserThread.h"
 #include "core/html/parser/HTMLScriptRunner.h"
 #include "core/html/parser/HTMLTreeBuilder.h"
@@ skipping 464 matching lines @@
 
 Document* HTMLDocumentParser::contextForParsingSession()
 {
     // The parsing session should interact with the document only when parsing
     // non-fragments. Otherwise, we might delay the load event mistakenly.
     if (isParsingFragment())
         return 0;
     return document();
 }
 
+static PassRefPtr<MediaValues> createMediaValues(Document* document)
+{
+    RefPtr<MediaValues> mediaValues = MediaValues::create(document, MediaValues::CachingMode);
+    ASSERT(mediaValues->isSafeToSendToAnotherThread());
+    return mediaValues;
+}
+
 void HTMLDocumentParser::pumpTokenizer(SynchronousMode mode)
 {
     ASSERT(!isStopped());
     ASSERT(!isScheduledForResume());
     // ASSERT that this object is both attached to the Document and protected.
     ASSERT(refCount() >= 2);
     ASSERT(m_tokenizer);
     ASSERT(m_token);
     ASSERT(!m_haveBackgroundParser || mode == ForceSynchronous);
 
@@ skipping 40 matching lines @@
     if (mode == ForceSynchronous)
         m_treeBuilder->flush();
     RELEASE_ASSERT(!isStopped());
 
     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(), document()->devicePixelRatio()));
+            m_preloadScanner = adoptPtr(new HTMLPreloadScanner(m_options, document()->url(), createMediaValues(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 56 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(), document()->devicePixelRatio()));
+            m_insertionPreloadScanner = adoptPtr(new HTMLPreloadScanner(m_options, document()->url(), createMediaValues(document())));
 
         m_insertionPreloadScanner->appendToEnd(source);
         m_insertionPreloadScanner->scan(m_preloader.get(), document()->baseElementURL());
     }
 
     endIfDelayed();
 }
 
 void HTMLDocumentParser::startBackgroundParser()
 {
     ASSERT(!isStopped());
     ASSERT(shouldUseThreading());
     ASSERT(!m_haveBackgroundParser);
     m_haveBackgroundParser = true;
 
     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(), document()->devicePixelRatio()));
+    config->preloadScanner = adoptPtr(new TokenPreloadScanner(document()->url().copy(), createMediaValues(document())));
     config->decoder = takeDecoder();
 
     ASSERT(config->xssAuditor->isSafeToSendToAnotherThread());
     ASSERT(config->preloadScanner->isSafeToSendToAnotherThread());
     HTMLParserThread::shared()->postTask(bind(&BackgroundHTMLParser::start, reference.release(), config.release()));
 }
 
 void HTMLDocumentParser::stopBackgroundParser()
 {
     ASSERT(shouldUseThreading());
@@ skipping 312 matching lines @@
 void HTMLDocumentParser::setDecoder(PassOwnPtr<TextResourceDecoder> decoder)
 {
     ASSERT(decoder);
     DecodedDataDocumentParser::setDecoder(decoder);
 
     if (m_haveBackgroundParser)
         HTMLParserThread::shared()->postTask(bind(&BackgroundHTMLParser::setDecoder, m_backgroundParser, takeDecoder()));
 }
 
 }