Turn MQ classes into thread safe

Source/core/css/MediaQueryEvaluator.cpp

Index: Source/core/css/MediaQueryEvaluator.cpp
diff --git a/Source/core/css/MediaQueryEvaluator.cpp b/Source/core/css/MediaQueryEvaluator.cpp
index 5517dca39b0eaaefb05df229c598570cadb36815..776427e910929e49be4e95f6215d9a0068513a27 100644
--- a/Source/core/css/MediaQueryEvaluator.cpp
+++ b/Source/core/css/MediaQueryEvaluator.cpp
@@ -70,7 +70,7 @@ MediaQueryEvaluator::MediaQueryEvaluator(bool mediaFeatureResult)
 {
 }
 
-MediaQueryEvaluator::MediaQueryEvaluator(const AtomicString& acceptedMediaType, bool mediaFeatureResult)
+MediaQueryEvaluator::MediaQueryEvaluator(const String& acceptedMediaType, bool mediaFeatureResult)
     : m_mediaType(acceptedMediaType)
     , m_frame(0)
     , m_style(nullptr)
@@ -86,7 +86,7 @@ MediaQueryEvaluator::MediaQueryEvaluator(const char* acceptedMediaType, bool med
 {
 }
 
-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)
@@ -98,7 +98,7 @@ MediaQueryEvaluator::~MediaQueryEvaluator()
 {
 }
 
-bool MediaQueryEvaluator::mediaTypeMatch(const AtomicString& mediaTypeToMatch) const
+bool MediaQueryEvaluator::mediaTypeMatch(const String& mediaTypeToMatch) const
 {
     return mediaTypeToMatch.isEmpty()
         || equalIgnoringCase(mediaTypeToMatch, "all")
@@ -110,7 +110,7 @@ bool MediaQueryEvaluator::mediaTypeMatchSpecific(const char* mediaTypeToMatch) c
     // Like mediaTypeMatch, but without the special cases for "" and "all".
     ASSERT(mediaTypeToMatch);
     ASSERT(mediaTypeToMatch[0] != '\0');
-    ASSERT(!equalIgnoringCase(mediaTypeToMatch, AtomicString("all")));
+    ASSERT(!equalIgnoringCase(mediaTypeToMatch, String("all")));

[abarth-chromium, 2014/03/06 08:03:57]

Didn't you create a static string for all?  We should probably use that here.

     return equalIgnoringCase(mediaTypeToMatch, m_mediaType);
 }