Avoid reparsing keyframe selectors

Source/core/css/resolver/StyleResolver.cpp

Index: Source/core/css/resolver/StyleResolver.cpp
diff --git a/Source/core/css/resolver/StyleResolver.cpp b/Source/core/css/resolver/StyleResolver.cpp
index 513d3bf90098caf2b1faeb9a0c6ae63d4a39c125..9ac5d962afd2df765dd18d7338e5b84799c487bd 100644
--- a/Source/core/css/resolver/StyleResolver.cpp
+++ b/Source/core/css/resolver/StyleResolver.cpp
@@ -1247,8 +1247,7 @@ void StyleResolver::keyframeStylesForAnimation(Element* e, const RenderStyle* el
         keyframeValue.setStyle(styleForKeyframe(elementStyle, keyframe, keyframeValue));
 
         // Add this keyframe style to all the indicated key times
-        Vector<float> keys;
-        keyframe->getKeys(keys);
+        Vector<float> keys = keyframe->getKeys();
         for (size_t keyIndex = 0; keyIndex < keys.size(); ++keyIndex) {
             keyframeValue.setKey(keys[keyIndex]);
             list.insert(keyframeValue);