Remove -webkit-aspect-ratio.

Source/core/core.gypi

 {
     'includes': [
       'core_generated.gypi',
     ],
     'variables': {
         # Files for which bindings (.cpp and .h files) will be generated
         'core_idl_files': [
             'animation/Animation.idl',
             'animation/AnimationEffect.idl',
             'animation/AnimationPlayer.idl',
@@ skipping 703 matching lines @@
             'clipboard/DataTransfer.h',
             'clipboard/DataTransferItem.cpp',
             'clipboard/DataTransferItem.h',
             'clipboard/DataTransferItemList.cpp',
             'clipboard/DataTransferItemList.h',
             'clipboard/Pasteboard.cpp',
             'clipboard/Pasteboard.h',
             'css/BasicShapeFunctions.cpp',
             'css/BinaryDataFontFaceSource.cpp',
             'css/BinaryDataFontFaceSource.h',
-            'css/CSSAspectRatioValue.cpp',
-            'css/CSSAspectRatioValue.h',
             'css/CSSBasicShapes.cpp',
             'css/CSSBorderImage.cpp',
             'css/CSSBorderImage.h',
             'css/CSSBorderImageSliceValue.cpp',
             'css/CSSBorderImageSliceValue.h',
             'css/CSSCalculationValue.cpp',
             'css/CSSCalculationValue.h',
             'css/CSSCanvasValue.cpp',
             'css/CSSCanvasValue.h',
             'css/CSSCharsetRule.cpp',
@@ skipping 2869 matching lines @@
             'rendering/shapes/BoxShapeTest.cpp',
             'rendering/style/OutlineValueTest.cpp',
             'testing/PrivateScriptTestTest.cpp',
             'streams/ReadableStreamTest.cpp',
             'testing/UnitTestHelpers.cpp',
             'testing/UnitTestHelpers.h',
             'xml/parser/SharedBufferReaderTest.cpp',
         ],
     }
 }