CSS filters: fix filtered parent with animated transform child.

third_party/WebKit/Source/core/animation/CompositorAnimations.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 226 matching lines @@
 
     unsigned transformPropertyCount = 0;
     for (const auto& property : properties) {
         if (!property.isCSSProperty())
             return false;
 
         if (isTransformRelatedCSSProperty(property)) {
             if (targetElement.layoutObject() && targetElement.layoutObject()->isInline() && !targetElement.layoutObject()->isInlineBlockOrInlineTable()) {
                 return false;
             }
+            for (LayoutObject* layoutObject = targetElement.layoutObject(); layoutObject; layoutObject = layoutObject->parent()) {
+                if (layoutObject->styleRef().filter().hasReferenceFilter()) {

[chrishtr, 2016/08/11 01:23:59]

All reference filters need css-specified geometry?

[Stephen White, 2016/08/11 15:17:12]

Yes. All reference filters include the "filter region" (the x/y/width/height
attributes on the <filter> node, see
https://drafts.fxtf.org/filters/#filter-region), which is expressed in terms of
the "fractions or percentages of the bounding box on the referencing element".
For hysterical reasons, it defaults to 10% larger than the bounding box (x=-10%,
y=-10%, width=120%, height=120%). So
even the default requires that we know the size.

+                    return false;
+                }
+            }
             transformPropertyCount++;
         }
 
         const PropertySpecificKeyframeVector& keyframes = keyframeEffect.getPropertySpecificKeyframes(property);
         ASSERT(keyframes.size() >= 2);
         for (const auto& keyframe : keyframes) {
             // FIXME: Determine candidacy based on the CSSValue instead of a snapshot AnimatableValue.
             bool isNeutralKeyframe = keyframe->isCSSPropertySpecificKeyframe() && !toCSSPropertySpecificKeyframe(keyframe.get())->value() && keyframe->composite() == EffectModel::CompositeAdd;
             if ((keyframe->composite() != EffectModel::CompositeReplace && !isNeutralKeyframe) || !keyframe->getAnimatableValue())
                 return false;
@@ skipping 386 matching lines @@
             break;
         default:
             NOTREACHED();
         }
         animations.append(std::move(animation));
     }
     ASSERT(!animations.isEmpty());
 }
 
 } // namespace blink