Web Animations: Support animation of SVG number attributes

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 896 matching lines @@
             'animation/InterpolationEffect.h',
             'animation/KeyframeEffectModel.cpp',
             'animation/KeyframeEffectModel.h',
             'animation/LegacyStyleInterpolation.h',
             'animation/LengthBoxStyleInterpolation.cpp',
             'animation/LengthBoxStyleInterpolation.h',
             'animation/LengthPairStyleInterpolation.cpp',
             'animation/LengthPairStyleInterpolation.h',
             'animation/LengthStyleInterpolation.cpp',
             'animation/LengthStyleInterpolation.h',
+            'animation/NumberSVGInterpolation.cpp',
+            'animation/NumberSVGInterpolation.h',
             'animation/PropertyHandle.cpp',
             'animation/PropertyHandle.h',
             'animation/SVGInterpolation.cpp',
             'animation/SVGInterpolation.h',
             'animation/SVGStrokeDasharrayStyleInterpolation.cpp',
             'animation/SVGStrokeDasharrayStyleInterpolation.h',
             'animation/SampledEffect.cpp',
             'animation/SampledEffect.h',
             'animation/ListSVGInterpolation.h',
             'animation/ListStyleInterpolation.h',
@@ skipping 2912 matching lines @@
             'paint/LayerClipRecorderTest.cpp',
             'paint/LayoutObjectDrawingRecorderTest.cpp',
             'paint/TextPainterTest.cpp',
             'streams/ReadableStreamReaderTest.cpp',
             'streams/ReadableStreamTest.cpp',
             'testing/PrivateScriptTestTest.cpp',
             'xml/parser/SharedBufferReaderTest.cpp',
         ],
     }
 }