Skip rule matching during animations.

Source/core/animation/ActiveAnimations.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 17 matching lines @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "config.h"
 #include "core/animation/ActiveAnimations.h"
 
 #include "core/rendering/RenderObject.h"
 
 namespace blink {
 
+ActiveAnimations::ActiveAnimations()
+    : m_animationStyleChange(false)
+{
+}
+
 ActiveAnimations::~ActiveAnimations()
 {
 #if !ENABLE(OILPAN)
     for (size_t i = 0; i < m_animations.size(); ++i)
         m_animations[i]->notifyElementDestroyed();
     m_animations.clear();
 #endif
 }
 
 void ActiveAnimations::updateAnimationFlags(RenderStyle& style)
@@ skipping 30 matching lines @@
 
 void ActiveAnimations::trace(Visitor* visitor)
 {
 #if ENABLE(OILPAN)
     visitor->trace(m_cssAnimations);
     visitor->trace(m_defaultStack);
     visitor->trace(m_players);
 #endif
 }
 
+const RenderStyle* ActiveAnimations::baseRenderStyle() const
+{
+#if !ENABLE(ASSERT)
+    if (isAnimationStyleChange())
+        return m_baseRenderStyle.get();
+#endif
+    return nullptr;
+}
+
+void ActiveAnimations::updateBaseRenderStyle(const RenderStyle* renderStyle)
+{
+    if (!isAnimationStyleChange()) {
+        m_baseRenderStyle = nullptr;
+        return;
+    }
+#if ENABLE(ASSERT)
+    if (m_baseRenderStyle && renderStyle)
+        ASSERT(*m_baseRenderStyle == *renderStyle);
+#endif
+    m_baseRenderStyle = RenderStyle::clone(renderStyle);
+}
+
 } // namespace blink