CSS filters: fix filtered parent with animated transform child.

third_party/WebKit/Source/core/paint/FilterEffectBuilder.cpp

Index: third_party/WebKit/Source/core/paint/FilterEffectBuilder.cpp
diff --git a/third_party/WebKit/Source/core/paint/FilterEffectBuilder.cpp b/third_party/WebKit/Source/core/paint/FilterEffectBuilder.cpp
index bdd61a68d4c4d59762d27118c581850e34f1167d..7e40a1eb3243559f9911bf6da67e37fd7c9d4c16 100644
--- a/third_party/WebKit/Source/core/paint/FilterEffectBuilder.cpp
+++ b/third_party/WebKit/Source/core/paint/FilterEffectBuilder.cpp
@@ -122,14 +122,14 @@ Vector<float> sepiaMatrix(double amount)
 
 FloatRect computeReferenceBox(const Element& element, const FloatSize* zoomedReferenceBoxSize, float zoom)
 {
-    FloatSize size;
+    FloatRect box;
     if (zoomedReferenceBoxSize) {
-        size = *zoomedReferenceBoxSize;
+        box = FloatRect(FloatPoint(), *zoomedReferenceBoxSize);
     } else if (element.isConnected() && element.layoutObject() && element.layoutObject()->enclosingLayer()) {
-        size = FloatSize(element.layoutObject()->enclosingLayer()->physicalBoundingBoxIncludingReflectionAndStackingChildren(LayoutPoint(), PaintLayer::CalculateBoundsOptions::AlwaysIncludeTransforms).size());
+        box = FloatRect(element.layoutObject()->enclosingLayer()->physicalBoundingBoxIncludingReflectionAndStackingChildren(LayoutPoint(), PaintLayer::CalculateBoundsOptions::AlwaysIncludeTransforms));
     }
-    size.scale(1.0f / zoom);
-    return FloatRect(FloatPoint(), size);
+    box.scale(1.0f / zoom);
+    return box;
 }
 
 } // namespace