Animation: Add template for ListStyleInterpolation

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 574 matching lines @@
             'animation/Interpolation.h',
             'animation/InterpolationEffect.cpp',
             '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/LengthPoint3DStyleInterpolation.cpp',
-            'animation/LengthPoint3DStyleInterpolation.h',
             'animation/LengthStyleInterpolation.cpp',
             'animation/LengthStyleInterpolation.h',
             'animation/SampledEffect.cpp',
             'animation/SampledEffect.h',
+            'animation/ListStyleInterpolation.h',
             'animation/ShadowStyleInterpolation.cpp',
             'animation/ShadowStyleInterpolation.h',
             'animation/StringKeyframe.cpp',
             'animation/StringKeyframe.h',
             'animation/StyleInterpolation.h',
             'animation/Timing.cpp',
             'animation/Timing.h',
             'animation/TimingCalculations.h',
             'animation/TimingInput.cpp',
             'animation/TimingInput.h',
@@ skipping 3031 matching lines @@
             'animation/CompositorAnimationsTestHelper.h',
             'animation/ColorStyleInterpolationTest.cpp',
             'animation/DeferredLegacyStyleInterpolationTest.cpp',
             'animation/DoubleStyleInterpolationTest.cpp',
             'animation/EffectInputTest.cpp',
             'animation/InterpolableValueTest.cpp',
             'animation/InterpolationEffectTest.cpp',
             'animation/KeyframeEffectModelTest.cpp',
             'animation/LengthBoxStyleInterpolationTest.cpp',
             'animation/LengthPairStyleInterpolationTest.cpp',
-            'animation/LengthPoint3DStyleInterpolationTest.cpp',
             'animation/LengthStyleInterpolationTest.cpp',
+            'animation/ListStyleInterpolationTest.cpp',
             'animation/ShadowStyleInterpolationTest.cpp',
             'animation/TimingCalculationsTest.cpp',
             'animation/TimingInputTest.cpp',
             'animation/VisibilityStyleInterpolationTest.cpp',
             'animation/animatable/AnimatableColorTest.cpp',
             'animation/animatable/AnimatableDoubleAndBoolTest.cpp',
             'animation/animatable/AnimatableDoubleTest.cpp',
             'animation/animatable/AnimatableLengthTest.cpp',
             'animation/animatable/AnimatableNeutralTest.cpp',
             'animation/animatable/AnimatableStrokeDasharrayListTest.cpp',
@@ skipping 85 matching lines @@
             'rendering/style/RenderStyleTest.cpp',
             'rendering/style/SVGRenderStyleTest.cpp',
             'streams/ReadableStreamTest.cpp',
             'testing/PrivateScriptTestTest.cpp',
             'testing/UnitTestHelpers.cpp',
             'testing/UnitTestHelpers.h',
             'xml/parser/SharedBufferReaderTest.cpp',
         ],
     }
 }