Emit console warning when element.animate() keyframe value fails to parse

third_party/WebKit/Source/core/css/PropertySetCSSStyleDeclaration.cpp

Index: third_party/WebKit/Source/core/css/PropertySetCSSStyleDeclaration.cpp
diff --git a/third_party/WebKit/Source/core/css/PropertySetCSSStyleDeclaration.cpp b/third_party/WebKit/Source/core/css/PropertySetCSSStyleDeclaration.cpp
index ecfbcd2b51545955edb2436a358da8265f027303..59fd3aef8025c866c8afee136f5cf8de42953b6c 100644
--- a/third_party/WebKit/Source/core/css/PropertySetCSSStyleDeclaration.cpp
+++ b/third_party/WebKit/Source/core/css/PropertySetCSSStyleDeclaration.cpp
@@ -302,20 +302,24 @@ void AbstractPropertySetCSSStyleDeclaration::setPropertyInternal(
   StyleAttributeMutationScope mutationScope(this);
   willMutate();
 
-  bool changed = false;
+  bool didChange = false;
   if (unresolvedProperty == CSSPropertyVariable) {
     bool isAnimationTainted = isKeyframeStyle();
-    changed = propertySet().setProperty(AtomicString(customPropertyName), value,
-                                        important, contextStyleSheet(),
-                                        isAnimationTainted);
+    didChange =
+        propertySet()
+            .setProperty(AtomicString(customPropertyName), value, important,
+                         contextStyleSheet(), isAnimationTainted)
+            .didChange;
   } else {
-    changed = propertySet().setProperty(unresolvedProperty, value, important,
-                                        contextStyleSheet());
+    didChange = propertySet()
+                    .setProperty(unresolvedProperty, value, important,
+                                 contextStyleSheet())
+                    .didChange;
   }
 
-  didMutate(changed ? PropertyChanged : NoChanges);
+  didMutate(didChange ? PropertyChanged : NoChanges);
 
-  if (!changed)
+  if (!didChange)
     return;
 
   Element* parent = parentElement();