Web Animations: Trigger and update CSS Animations backed by the Web Animations model

Source/core/animation/Player.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 76 matching lines @@
 bool Player::update()
 {
     if (!m_content)
         return false;
 
     double newTime = isNull(m_timeline->currentTime()) ? nullValue() : currentTime();
     m_content->updateInheritedTime(newTime);
     return m_content->isCurrent() || m_content->isInEffect();
 }
 
+void Player::cancel()
+{
+    if (!m_content)
+        return;
+
+    m_content->detach();
+    m_content = 0;
+}
+
 void Player::setCurrentTime(double seekTime)
 {
     if (paused())
         m_pauseStartTime = seekTime;
     else
         m_timeDrift = currentTimeBeforeDrift() - seekTime;
 
     update();
 }
 
@@ skipping 11 matching lines @@
 }
 
 void Player::setPlaybackRate(double newRate)
 {
     double previousTime = currentTime();
     m_playbackRate = newRate;
     setCurrentTime(previousTime);
 }
 
 } // namespace