Avoid reparsing keyframe selectors

Source/core/css/resolver/StyleResolver.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 2004-2005 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2006, 2007 Nicholas Shanks (webkit@nickshanks.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
  * Copyright (C) 2007, 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (c) 2011, Code Aurora Forum. All rights reserved.
  * Copyright (C) Research In Motion Limited 2011. All rights reserved.
@@ skipping 1167 matching lines @@
     for (unsigned i = 0; i < keyframes.size(); ++i) {
         // Apply the declaration to the style. This is a simplified version of the logic in styleForElement
         m_state.initForStyleResolve(document(), e);
 
         const StyleKeyframe* keyframe = keyframes[i].get();
 
         KeyframeValue keyframeValue(0, 0);
         keyframeValue.setStyle(styleForKeyframe(elementStyle, keyframe, keyframeValue));
 
         // Add this keyframe style to all the indicated key times
-        Vector<float> keys;
-        keyframe->getKeys(keys);
+        const Vector<float>& keys = keyframe->keys();
         for (size_t keyIndex = 0; keyIndex < keys.size(); ++keyIndex) {
             keyframeValue.setKey(keys[keyIndex]);
             list.insert(keyframeValue);
         }
     }
 
     // If the 0% keyframe is missing, create it (but only if there is at least one other keyframe)
     int initialListSize = list.size();
     if (initialListSize > 0 && list[0].key()) {
         static StyleKeyframe* zeroPercentKeyframe;
@@ skipping 2237 matching lines @@
     info.addMember(m_state, "state");
 
     // FIXME: move this to a place where it would be called only once?
     info.addMember(CSSDefaultStyleSheets::defaultStyle, "defaultStyle");
     info.addMember(CSSDefaultStyleSheets::defaultQuirksStyle, "defaultQuirksStyle");
     info.addMember(CSSDefaultStyleSheets::defaultPrintStyle, "defaultPrintStyle");
     info.addMember(CSSDefaultStyleSheets::defaultViewSourceStyle, "defaultViewSourceStyle");
 }
 
 } // namespace WebCore