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

Source/core/animation/Player.cpp

Index: Source/core/animation/Player.cpp
diff --git a/Source/core/animation/Player.cpp b/Source/core/animation/Player.cpp
index abb23f92de91c87fcefd054a7b02b241a2688732..7af07e2d49d65b3a5eec3c711c701b721db9aef0 100644
--- a/Source/core/animation/Player.cpp
+++ b/Source/core/animation/Player.cpp
@@ -94,6 +94,15 @@ bool Player::update()
     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())