Web Animations API: Load resources referenced in element.animate() (reland)

Source/core/animation/EffectInput.cpp

Index: Source/core/animation/EffectInput.cpp
diff --git a/Source/core/animation/EffectInput.cpp b/Source/core/animation/EffectInput.cpp
index b2da1f19795ad1a1980495657caea75c33903a12..0d132da1318ed0efffd34064dafe7016942d8260 100644
--- a/Source/core/animation/EffectInput.cpp
+++ b/Source/core/animation/EffectInput.cpp
@@ -55,6 +55,8 @@ PassRefPtrWillBeRawPtr<AnimationEffect> EffectInput::convert(Element* element, c
     if (!unsafe && !checkDocumentAndRenderer(element))
         return nullptr;
 
+    StyleSheetContents* styleSheetContents = element->document().elementSheet().contents();
+
     // FIXME: Move this code into KeyframeEffectModel, it will be used by the IDL constructor for that class.
     KeyframeEffectModel::KeyframeVector keyframes;
     WillBeHeapVector<RefPtrWillBeMember<MutableStylePropertySet> > propertySetVector;
@@ -99,7 +101,7 @@ PassRefPtrWillBeRawPtr<AnimationEffect> EffectInput::convert(Element* element, c
 
             String value;
             keyframeDictionaryVector[i].get(property, value);
-            propertySet->setProperty(id, value);
+            propertySet->setProperty(id, value, false, styleSheetContents);
         }
     }