Web Animations CSS: Split AnimatableNumber into AnimatableDouble and AnimatableLength

Source/core/core.gypi

 {
     'variables': {
         'core_idl_files': [
             'css/CSS.idl',
             'css/CSSCharsetRule.idl',
             'css/CSSFontFaceLoadEvent.idl',
             'css/CSSFontFaceRule.idl',
             'css/CSSHostRule.idl',
             'css/CSSImportRule.idl',
             'css/CSSKeyframeRule.idl',
@@ skipping 507 matching lines @@
             'accessibility/AccessibilityTableCell.h',
             'accessibility/AccessibilityTableColumn.cpp',
             'accessibility/AccessibilityTableColumn.h',
             'accessibility/AccessibilityTableHeaderContainer.cpp',
             'accessibility/AccessibilityTableHeaderContainer.h',
             'accessibility/AccessibilityTableRow.cpp',
             'accessibility/AccessibilityTableRow.h',
             'animation/ActiveAnimations.h',
             'animation/AnimatableColor.cpp',
             'animation/AnimatableColor.h',
+            'animation/AnimatableDouble.cpp',
+            'animation/AnimatableDouble.h',
             'animation/AnimatableImage.cpp',
             'animation/AnimatableImage.h',
+            'animation/AnimatableLength.cpp',
+            'animation/AnimatableLength.h',
             'animation/AnimatableLengthBox.cpp',
             'animation/AnimatableLengthBox.h',
             'animation/AnimatableLengthSize.cpp',
             'animation/AnimatableLengthSize.h',
             'animation/AnimatableNeutral.h',
-            'animation/AnimatableNumber.cpp',
-            'animation/AnimatableNumber.h',
             'animation/AnimatableTransform.cpp',
             'animation/AnimatableTransform.h',
             'animation/AnimatableUnknown.h',
             'animation/AnimatableValue.cpp',
             'animation/AnimatableValue.h',
             'animation/AnimatableVisibility.cpp',
             'animation/AnimatableVisibility.h',
             'animation/Animation.cpp',
             'animation/Animation.h',
             'animation/AnimationEffect.h',
@@ skipping 3242 matching lines @@
             'platform/chromium/support/WebURLError.cpp',
             'platform/chromium/support/WebURLRequest.cpp',
             'platform/chromium/support/WebURLRequestPrivate.h',
             'platform/chromium/support/WebURLResponse.cpp',
             'platform/chromium/support/WebURLResponsePrivate.h',
             'platform/chromium/support/WrappedResourceRequest.h',
             'platform/chromium/support/WrappedResourceResponse.h',
         ],
         'core_unittest_files': [
             'animation/AnimatableColorTest.cpp',
+            'animation/AnimatableDoubleTest.cpp',
+            'animation/AnimatableLengthTest.cpp',
             'animation/AnimatableNeutralTest.cpp',
-            'animation/AnimatableNumberTest.cpp',
             'animation/AnimatableUnknownTest.cpp',
             'animation/DocumentTimelineTest.cpp',
             'animation/KeyframeAnimationEffectTest.cpp',
             'animation/PlayerTest.cpp',
             'animation/TimedItemCalculationsTest.cpp',
             'animation/TimedItemTest.cpp',
             'css/CSSParserValuesTest.cpp',
             'css/CSSCalculationValueTest.cpp',
             'fetch/ImageResourceTest.cpp',
             'fetch/MemoryCacheTest.cpp',
@@ skipping 63 matching lines @@
                 'bison_exe': 'bison',
                 # We specify a preprocess so it happens locally and won't get
                 # distributed to goma.
                 # FIXME: /usr/bin/gcc won't exist on OSX forever. We want to
                 # use /usr/bin/clang once we require Xcode 4.x.
                 'preprocessor': '--preprocessor "/usr/bin/gcc -E -P -x c++"'
               }],
          ],
     }
 }