Let StyleResolver figure out differences between UA style and resolved style.

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/AnimationNode.idl',
@@ skipping 669 matching lines @@
             'layout/shapes/RasterShape.cpp',
             'layout/shapes/RasterShape.h',
             'layout/shapes/RectangleShape.cpp',
             'layout/shapes/RectangleShape.h',
             'layout/shapes/Shape.cpp',
             'layout/shapes/Shape.h',
             'layout/shapes/ShapeInterval.h',
             'layout/shapes/ShapeOutsideInfo.cpp',
             'layout/shapes/ShapeOutsideInfo.h',
             'layout/style/AppliedTextDecoration.cpp',
+            'layout/style/AuthorStyleInfo.h',
             'layout/style/BasicShapes.cpp',
             'layout/style/BorderEdge.cpp',
             'layout/style/BorderEdge.h',
             'layout/style/BorderImageLength.h',
             'layout/style/BorderImageLengthBox.h',
             'layout/style/CachedUAStyle.h',
             'layout/style/ContentData.cpp',
             'layout/style/CounterDirectives.cpp',
             'layout/style/FillLayer.cpp',
             'layout/style/GridCoordinate.h',
@@ skipping 3073 matching lines @@
             'rendering/RenderingTestHelper.h',
             'streams/ExclusiveStreamReaderTest.cpp',
             'streams/ReadableStreamTest.cpp',
             'testing/PrivateScriptTestTest.cpp',
             'testing/UnitTestHelpers.cpp',
             'testing/UnitTestHelpers.h',
             'xml/parser/SharedBufferReaderTest.cpp',
         ],
     }
 }