Enable MQ evaluation off the main thread

Source/core/html/parser/HTMLResourcePreloader.cpp

Index: Source/core/html/parser/HTMLResourcePreloader.cpp
diff --git a/Source/core/html/parser/HTMLResourcePreloader.cpp b/Source/core/html/parser/HTMLResourcePreloader.cpp
index 0c1a17a714b774cd81fb305678fd725c4e7905de..a3d5bd0546b9cc5edc78d75478b820bfce9f076b 100644
--- a/Source/core/html/parser/HTMLResourcePreloader.cpp
+++ b/Source/core/html/parser/HTMLResourcePreloader.cpp
@@ -30,10 +30,6 @@
 #include "core/loader/cache/CachedResourceInitiatorInfo.h"
 #include "core/loader/cache/CachedResourceLoader.h"
 
-#include "core/css/MediaList.h"
-#include "core/css/MediaQueryEvaluator.h"
-#include "core/rendering/RenderObject.h"
-
 namespace WebCore {
 
 bool PreloadRequest::isSafeToSendToAnotherThread() const
@@ -41,7 +37,6 @@ bool PreloadRequest::isSafeToSendToAnotherThread() const
     return m_initiatorName.isSafeToSendToAnotherThread()
         && m_charset.isSafeToSendToAnotherThread()
         && m_resourceURL.isSafeToSendToAnotherThread()
-        && m_mediaAttribute.isSafeToSendToAnotherThread()
         && m_baseURL.isSafeToSendToAnotherThread();
 }
 
@@ -73,21 +68,8 @@ void HTMLResourcePreloader::takeAndPreload(PreloadRequestStream& r)
         preload(it->release());
 }
 
-static bool mediaAttributeMatches(Frame* frame, RenderStyle* renderStyle, const String& attributeValue)
-{
-    RefPtr<MediaQuerySet> mediaQueries = MediaQuerySet::create(attributeValue);
-    MediaQueryEvaluator mediaQueryEvaluator("screen", frame, renderStyle);
-    return mediaQueryEvaluator.eval(mediaQueries.get());
-}
-
 void HTMLResourcePreloader::preload(PassOwnPtr<PreloadRequest> preload)
 {
-    ASSERT(m_document->frame());
-    ASSERT(m_document->renderer());
-    ASSERT(m_document->renderer()->style());
-    if (!preload->media().isEmpty() && !mediaAttributeMatches(m_document->frame(), m_document->renderer()->style(), preload->media()))
-        return;
-
     CachedResourceRequest request = preload->resourceRequest(m_document);
     m_document->cachedResourceLoader()->preload(preload->resourceType(), request, preload->charset());
 }