Web Animations: Support animation of flood-opacity

Source/core/animation/css/CSSAnimatableValueFactory.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 206 matching lines @@
     case CSSPropertyFill:
         return AnimatableSVGPaint::create(style->svgStyle()->fillPaintType(), style->svgStyle()->fillPaintColor(), style->svgStyle()->fillPaintUri());
     case CSSPropertyFlexGrow:
         return createFromDouble(style->flexGrow(), AnimatableDouble::InterpolationIsNonContinuousWithZero);
     case CSSPropertyFlexShrink:
         return createFromDouble(style->flexShrink(), AnimatableDouble::InterpolationIsNonContinuousWithZero);
     case CSSPropertyFlexBasis:
         return createFromLength(style->flexBasis(), style);
     case CSSPropertyFloodColor:
         return createFromColor(property, style);
+    case CSSPropertyFloodOpacity:
+        return createFromDouble(style->floodOpacity());
     case CSSPropertyFontSize:
         // Must pass a specified size to setFontSize if Text Autosizing is enabled, but a computed size
         // if text zoom is enabled (if neither is enabled it's irrelevant as they're probably the same).
         // FIXME: Should we introduce an option to pass the computed font size here, allowing consumers to
         // enable text zoom rather than Text Autosizing? See http://crbug.com/227545.
         return createFromDouble(style->specifiedFontSize());
     case CSSPropertyHeight:
         return createFromLength(style->height(), style);
     case CSSPropertyKerning:
         return AnimatableSVGLength::create(style->kerning());
@@ skipping 116 matching lines @@
     case CSSPropertyZoom:
         return createFromDouble(style->zoom());
     default:
         RELEASE_ASSERT_WITH_MESSAGE(!CSSAnimations::isAnimatableProperty(property), "Web Animations not yet implemented: Create AnimatableValue from render style: %s", getPropertyNameString(property).utf8().data());
         ASSERT_NOT_REACHED();
         return 0;
     }
 }
 
 } // namespace WebCore