Replaced PassRefPtr copies with moves in Source/core/animation.

third_party/WebKit/Source/core/animation/KeyframeEffectModel.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 268 matching lines @@
     DCHECK_GE(m_keyframes.size(), 2U);
 }
 
 bool KeyframeEffectModelBase::PropertySpecificKeyframeGroup::addSyntheticKeyframeIfRequired(PassRefPtr<TimingFunction> zeroOffsetEasing)
 {
     DCHECK(!m_keyframes.isEmpty());
 
     bool addedSyntheticKeyframe = false;
 
     if (m_keyframes.first()->offset() != 0.0) {
-        m_keyframes.insert(0, m_keyframes.first()->neutralKeyframe(0, zeroOffsetEasing));
+        m_keyframes.insert(0, m_keyframes.first()->neutralKeyframe(0, std::move(zeroOffsetEasing)));
         addedSyntheticKeyframe = true;
     }
     if (m_keyframes.last()->offset() != 1.0) {
         appendKeyframe(m_keyframes.last()->neutralKeyframe(1, nullptr));
         addedSyntheticKeyframe = true;
     }
 
     return addedSyntheticKeyframe;
 }
 
 } // namespace blink