Add StylePath and use it to store 'd' in ComputedStyle

third_party/WebKit/Source/core/core.gypi

 {
     'includes': [
         'core_generated.gypi',
     ],
     'variables': {
         # Files for which bindings (.cpp and .h files) will be generated
         'core_idl_files': [
             'animation/KeyframeEffect.idl',
             'animation/EffectModel.idl',
             'animation/AnimationEffectReadOnly.idl',
@@ skipping 772 matching lines @@
             'style/StyleFilterData.cpp',
             'style/StyleFlexibleBoxData.cpp',
             'style/StyleGeneratedImage.cpp',
             'style/StyleGridData.cpp',
             'style/StyleGridItemData.cpp',
             'style/StyleInheritedData.cpp',
             'style/StyleMotionData.cpp',
             'style/StyleMotionData.h',
             'style/StyleMotionPath.h',
             'style/StyleMultiColData.cpp',
+            'style/StylePath.cpp',
+            'style/StylePath.h',
             'style/StylePendingImage.h',
             'style/StyleRareInheritedData.cpp',
             'style/StyleRareNonInheritedData.cpp',
             'style/StyleScrollSnapData.cpp',
             'style/StyleScrollSnapData.h',
             'style/StyleSelfAlignmentData.h',
             'style/StyleSurroundData.cpp',
             'style/StyleTransformData.cpp',
             'style/StyleVariableData.cpp',
             'style/StyleVariableData.h',
@@ skipping 3179 matching lines @@
             'style/SVGComputedStyleTest.cpp',
             'svg/SVGPathParserTest.cpp',
             'svg/UnsafeSVGAttributeSanitizationTest.cpp',
             'testing/PrivateScriptTestTest.cpp',
             'timing/MemoryInfoTest.cpp',
             'workers/WorkerThreadTest.cpp',
             'xml/parser/SharedBufferReaderTest.cpp',
         ],
     }
 }