Turn MQ classes into thread safe

Source/core/css/MediaQueryEvaluator.cpp

 /*
  * CSS Media Query Evaluator
  *
  * Copyright (C) 2006 Kimmo Kinnunen <kimmo.t.kinnunen@nokia.com>.
  * Copyright (C) 2013 Apple Inc. All rights reserved.
  * Copyright (C) 2013 Intel Corporation. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
@@ skipping 15 matching lines @@
  * (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/css/MediaQueryEvaluator.h"
 
 #include "CSSValueKeywords.h"
 #include "MediaFeatureNames.h"
 #include "MediaFeatures.h"
+#include "MediaTypeNames.h"
 #include "core/css/CSSAspectRatioValue.h"
 #include "core/css/CSSHelper.h"
 #include "core/css/CSSPrimitiveValue.h"
 #include "core/css/CSSToLengthConversionData.h"
 #include "core/css/MediaList.h"
 #include "core/css/MediaQuery.h"
 #include "core/css/resolver/MediaQueryResult.h"
 #include "core/dom/NodeRenderStyle.h"
 #include "core/frame/FrameHost.h"
 #include "core/frame/FrameView.h"
@@ skipping 17 matching lines @@
 typedef HashMap<StringImpl*, EvalFunc> FunctionMap;
 static FunctionMap* gFunctionMap;
 
 MediaQueryEvaluator::MediaQueryEvaluator(bool mediaFeatureResult)
     : m_frame(0)
     , m_style(nullptr)
     , m_expResult(mediaFeatureResult)
 {
 }
 
-MediaQueryEvaluator::MediaQueryEvaluator(const AtomicString& acceptedMediaType, bool mediaFeatureResult)
+MediaQueryEvaluator::MediaQueryEvaluator(const String& acceptedMediaType, bool mediaFeatureResult)
     : m_mediaType(acceptedMediaType)
     , m_frame(0)
     , m_style(nullptr)
     , m_expResult(mediaFeatureResult)
 {
 }
 
 MediaQueryEvaluator::MediaQueryEvaluator(const char* acceptedMediaType, bool mediaFeatureResult)
     : m_mediaType(acceptedMediaType)
     , m_frame(0)
     , m_style(nullptr)
     , m_expResult(mediaFeatureResult)
 {
 }
 
-MediaQueryEvaluator::MediaQueryEvaluator(const AtomicString& acceptedMediaType, LocalFrame* frame, RenderStyle* style)
+MediaQueryEvaluator::MediaQueryEvaluator(const String& acceptedMediaType, LocalFrame* frame, RenderStyle* style)
     : m_mediaType(acceptedMediaType)
     , m_frame(frame)
     , m_style(style)
     , m_expResult(false) // Doesn't matter when we have m_frame and m_style.
 {
 }
 
 MediaQueryEvaluator::~MediaQueryEvaluator()
 {
 }
 
-bool MediaQueryEvaluator::mediaTypeMatch(const AtomicString& mediaTypeToMatch) const
+bool MediaQueryEvaluator::mediaTypeMatch(const String& mediaTypeToMatch) const
 {
     return mediaTypeToMatch.isEmpty()
-        || equalIgnoringCase(mediaTypeToMatch, "all")
+        || equalIgnoringCase(mediaTypeToMatch, MediaTypeNames::all)
         || equalIgnoringCase(mediaTypeToMatch, m_mediaType);
 }
 
 bool MediaQueryEvaluator::mediaTypeMatchSpecific(const char* mediaTypeToMatch) const
 {
     // Like mediaTypeMatch, but without the special cases for "" and "all".
     ASSERT(mediaTypeToMatch);
     ASSERT(mediaTypeToMatch[0] != '\0');
-    ASSERT(!equalIgnoringCase(mediaTypeToMatch, AtomicString("all")));
+    ASSERT(!equalIgnoringCase(mediaTypeToMatch, MediaTypeNames::all));
     return equalIgnoringCase(mediaTypeToMatch, m_mediaType);
 }
 
 static bool applyRestrictor(MediaQuery::Restrictor r, bool value)
 {
     return r == MediaQuery::Not ? !value : value;
 }
 
 bool MediaQueryEvaluator::eval(const MediaQuerySet* querySet, MediaQueryResultList* viewportDependentMediaQueryResults) const
 {
@@ skipping 567 matching lines @@
     // Call the media feature evaluation function. Assume no prefix and let
     // trampoline functions override the prefix if prefix is used.
     EvalFunc func = gFunctionMap->get(expr->mediaFeature().impl());
     if (func)
         return func(expr->value(), m_style.get(), m_frame, NoPrefix);
 
     return false;
 }
 
 } // namespace