Web Animations API: Refactor IDL input conversion out of Animation

Source/core/core.gypi

 {
     'variables': {
         # Files for which bindings (.cpp and .h files) will be generated
         'core_idl_files': [
             'animation/Animation.idl',
             'animation/Player.idl',
             'animation/TimedItem.idl',
             'animation/Timeline.idl',
             'animation/Timing.idl',
             'clipboard/Clipboard.idl',
@@ skipping 573 matching lines @@
             'animation/AnimationTranslationUtil.cpp',
             'animation/AnimationTranslationUtil.h',
             'animation/CompositorAnimations.cpp',
             'animation/CompositorAnimations.h',
             'animation/CompositorAnimationsImpl.h',
             'animation/DocumentAnimation.h',
             'animation/DocumentAnimations.cpp',
             'animation/DocumentAnimations.h',
             'animation/DocumentTimeline.cpp',
             'animation/DocumentTimeline.h',
-            'animation/ElementAnimation.cpp',
             'animation/ElementAnimation.h',
             'animation/InertAnimation.cpp',
             'animation/InertAnimation.h',
             'animation/KeyframeEffectModel.cpp',
             'animation/KeyframeEffectModel.h',
             'animation/Player.cpp',
             'animation/Player.h',
             'animation/TimedItem.cpp',
             'animation/TimedItem.h',
             'animation/TimedItemCalculations.h',
             'animation/TimedItemTiming.cpp',
             'animation/TimedItemTiming.h',
+            'animation/Timing.cpp',
             'animation/Timing.h',
             'animation/css/CSSAnimatableValueFactory.cpp',
             'animation/css/CSSAnimatableValueFactory.h',
             'animation/css/CSSAnimations.cpp',
             'animation/css/CSSAnimations.h',
             'animation/css/CSSAnimationData.cpp',
             'animation/css/CSSAnimationData.h',
             'animation/css/CSSAnimationDataList.cpp',
             'animation/css/CSSAnimationDataList.h',
             'animation/css/CSSPendingAnimations.cpp',
@@ skipping 2618 matching lines @@
             'animation/AnimatableStrokeDasharrayListTest.cpp',
             'animation/AnimatableUnknownTest.cpp',
             'animation/AnimatableValueTestHelper.cpp',
             'animation/AnimatableValueTestHelper.h',
             'animation/AnimatableValueTestHelperTest.cpp',
             'animation/AnimationClockTest.cpp',
             'animation/AnimationHelpersTest.cpp',
             'animation/AnimationTest.cpp',
             'animation/AnimationTestHelper.cpp',
             'animation/AnimationTestHelper.h',
-            'animation/AnimationTimingInputTest.cpp',
             'animation/AnimationTranslationUtilTest.cpp',
             'animation/CompositorAnimationsTest.cpp',
             'animation/CompositorAnimationsTestHelper.h',
             'animation/CompositorAnimationsTimingFunctionReverserTest.cpp',
             'animation/DocumentTimelineTest.cpp',
             'animation/KeyframeEffectModelTest.cpp',
             'animation/PlayerTest.cpp',
             'animation/TimedItemCalculationsTest.cpp',
             'animation/TimedItemTest.cpp',
+            'animation/TimingInputTest.cpp',
             'css/AffectedByFocusTest.cpp',
             'css/CSSCalculationValueTest.cpp',
             'css/CSSFontFaceTest.cpp',
             'css/CSSTestHelper.cpp',
             'css/CSSTestHelper.h',
             'css/CSSValueTestHelper.h',
             'css/CSSParserValuesTest.cpp',
             'css/CSSSelectorTest.cpp',
             'css/CSSValueTestHelper.h',
             'css/DragUpdateTest.cpp',
@@ skipping 18 matching lines @@
             'html/parser/HTMLParserThreadTest.cpp',
             'html/track/vtt/BufferedLineReaderTest.cpp',
             'html/track/vtt/VTTScannerTest.cpp',
             'rendering/RenderOverflowTest.cpp',
             'rendering/shapes/BoxShapeTest.cpp',
             'testing/UnitTestHelpers.cpp',
             'testing/UnitTestHelpers.h',
         ],
     }
 }