A thread safe CSS calc parser for sizes

Source/core/core.gypi

 {
     'variables': {
         # Files for which bindings (.cpp and .h files) will be generated
         'core_idl_files': [
             'animation/Animation.idl',
             'animation/AnimationPlayer.idl',
             'animation/TimedItem.idl',
             'animation/Timeline.idl',
             'animation/Timing.idl',
             'clipboard/DataTransfer.idl',
@@ skipping 888 matching lines @@
             'css/invalidation/StyleInvalidator.cpp',
             'css/invalidation/StyleInvalidator.h',
             'css/invalidation/StyleSheetInvalidationAnalysis.cpp',
             'css/invalidation/StyleSheetInvalidationAnalysis.h',
             'css/parser/BisonCSSParser.h',
             'css/parser/CSSPropertyParser.cpp',
             'css/parser/CSSPropertyParser.h',
             'css/parser/MediaQueryBlockWatcher.cpp',
             'css/parser/MediaQueryInputStream.cpp',
             'css/parser/MediaQueryParser.cpp',
+            'css/parser/SizesCalcParser.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',
             'css/resolver/CSSToStyleMap.h',
             'css/resolver/ElementResolveContext.cpp',
             'css/resolver/ElementResolveContext.h',
             'css/resolver/ElementStyleResources.cpp',
@@ skipping 2440 matching lines @@
             'css/CSSTestHelper.cpp',
             'css/CSSTestHelper.h',
             'css/CSSValueTestHelper.h',
             'css/DragUpdateTest.cpp',
             'css/MediaValuesTest.cpp',
             'css/MediaQueryEvaluatorTest.cpp',
             'css/MediaQuerySetTest.cpp',
             'css/RuleSetTest.cpp',
             'css/invalidation/DescendantInvalidationSetTest.cpp',
             'css/parser/BisonCSSParserTest.cpp',
+            'css/parser/SizesCalcParserTest.cpp',
             'css/parser/MediaQueryTokenizerTest.cpp',
             'css/parser/SizesAttributeParserTest.cpp',
             'css/parser/MediaConditionTest.cpp',
             'css/resolver/FontBuilderTest.cpp',
             'dom/ActiveDOMObjectTest.cpp',
             'dom/DOMImplementationTest.cpp',
             'dom/DocumentMarkerControllerTest.cpp',
             'dom/DocumentTest.cpp',
             'dom/MainThreadTaskRunnerTest.cpp',
             'dom/RangeTest.cpp',
@@ skipping 15 matching lines @@
             'html/track/vtt/VTTScannerTest.cpp',
             'loader/MixedContentCheckerTest.cpp',
             'rendering/RenderOverflowTest.cpp',
             'rendering/shapes/BoxShapeTest.cpp',
             'testing/UnitTestHelpers.cpp',
             'testing/UnitTestHelpers.h',
             'xml/parser/SharedBufferReaderTest.cpp',
         ],
     }
 }