SVG animate should respect attribute 'restart=never'.

Source/core/svg/animation/SVGSMILElement.cpp

 /*
  * Copyright (C) 2008 Apple 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 925 matching lines @@
     return false;
 }
 
 SMILTime SVGSMILElement::nextProgressTime() const
 {
     return m_nextProgressTime;
 }
 
 void SVGSMILElement::beginListChanged(SMILTime eventTime)
 {
-    if (m_isWaitingForFirstInterval)
+    if (m_isWaitingForFirstInterval) {
         resolveFirstInterval();
-    else {
+    } else if (this->restart() != RestartNever) {

[fs, 2015/05/08 10:28:31]

I still think this should be checked later, but I'll accept this as-is given the
state of things.

         SMILTime newBegin = findInstanceTime(Begin, eventTime, true);
         if (newBegin.isFinite() && (m_interval.end <= eventTime || newBegin < m_interval.begin)) {
             // Begin time changed, re-resolve the interval.
             SMILTime oldBegin = m_interval.begin;
             m_interval.end = eventTime;
             m_interval = resolveInterval(NextInterval);
             ASSERT(!m_interval.begin.isUnresolved());
             if (m_interval.begin != oldBegin) {
                 if (m_activeState == Active && m_interval.begin > eventTime) {
                     m_activeState = determineActiveState(eventTime);
@@ skipping 394 matching lines @@
     visitor->trace(m_targetElement);
     visitor->trace(m_timeContainer);
     visitor->trace(m_conditions);
     visitor->trace(m_syncBaseDependents);
 #endif
     SVGElement::trace(visitor);
     SVGTests::trace(visitor);
 }
 
 } // namespace blink