A sizes attribute parser

Source/core/core.gypi

Index: Source/core/core.gypi
diff --git a/Source/core/core.gypi b/Source/core/core.gypi
index 675f7065cc1f8fa257ba7c772d0bd97c6c55dd6e..5278f476d900429474020a07f555032988dec740 100644
--- a/Source/core/core.gypi
+++ b/Source/core/core.gypi
@@ -846,6 +846,8 @@
             'css/MediaQueryMatcher.cpp',
             'css/MediaQueryMatcher.h',
             'css/MediaValues.cpp',
+            'css/MediaValuesCached.cpp',
+            'css/MediaValuesDynamic.cpp',
             'css/PageRuleCollector.cpp',
             'css/PageRuleCollector.h',
             'css/Pair.cpp',
@@ -905,6 +907,7 @@
             'css/parser/MediaQueryParser.cpp',
             'css/parser/MediaQueryToken.cpp',
             'css/parser/MediaQueryTokenizer.cpp',
+            'css/parser/SizesAttributeParser.cpp',
             'css/resolver/AnimatedStyleBuilder.cpp',
             'css/resolver/AnimatedStyleBuilder.h',
             'css/resolver/CSSToStyleMap.cpp',
@@ -3352,6 +3355,7 @@
             'css/invalidation/DescendantInvalidationSetTest.cpp',
             'css/parser/BisonCSSParserTest.cpp',
             'css/parser/MediaQueryTokenizerTest.cpp',
+            'css/parser/SizesAttributeParserTest.cpp',
             'css/parser/MediaConditionTest.cpp',
             'css/resolver/FontBuilderTest.cpp',
             'dom/ActiveDOMObjectTest.cpp',