Define contentsProperties on ObjectPaintProperties, for use in paint invalidation.

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/AnimationEffectReadOnly.idl',
             'animation/AnimationEffectTiming.idl',
@@ skipping 2131 matching lines @@
             'paint/ListMarkerPainter.cpp',
             'paint/ListMarkerPainter.h',
             'paint/MediaControlsPainter.cpp',
             'paint/MediaControlsPainter.h',
             'paint/MultiColumnSetPainter.cpp',
             'paint/MultiColumnSetPainter.h',
             'paint/NinePieceImageGrid.cpp',
             'paint/NinePieceImageGrid.h',
             'paint/NinePieceImagePainter.cpp',
             'paint/NinePieceImagePainter.h',
+            'paint/ObjectPaintProperties.cpp',
             'paint/ObjectPaintProperties.h',
             'paint/ObjectPaintInvalidator.cpp',
             'paint/ObjectPaintInvalidator.h',
             'paint/ObjectPainter.cpp',
             'paint/ObjectPainter.h',
             'paint/PaintInfo.cpp',
             'paint/PaintInfo.h',
             'paint/PaintInvalidationCapableScrollableArea.cpp',
             'paint/PaintInvalidationCapableScrollableArea.h',
             'paint/PaintInvalidator.cpp',
@@ skipping 1874 matching lines @@
             'testing/TypeConversions.h',
             'testing/UnionTypesTest.cpp',
             'testing/UnionTypesTest.h',
             'testing/v8/WebCoreTestSupport.cpp',
             'testing/v8/WebCoreTestSupport.h',
             'testing/WorkerInternals.cpp',
             'testing/WorkerInternals.h',
         ],
     }
 }