SVG animate should respect attribute 'restart=never'.

Source/core/svg/animation/SVGSMILElement.cpp

Index: Source/core/svg/animation/SVGSMILElement.cpp
diff --git a/Source/core/svg/animation/SVGSMILElement.cpp b/Source/core/svg/animation/SVGSMILElement.cpp
index 719cd493840b94a7801b10273ec43467b5cb4cea..10cae7b908794396b6ddcbde321f87b5a49a0815 100644
--- a/Source/core/svg/animation/SVGSMILElement.cpp
+++ b/Source/core/svg/animation/SVGSMILElement.cpp
@@ -1130,6 +1130,11 @@ bool SVGSMILElement::progress(SMILTime elapsed, SVGSMILElement* resultElement, b
         return false;
     }
 
+    if (!m_isWaitingForFirstInterval && m_activeState != Active && this->restart() == RestartNever) {
+        m_nextProgressTime = SMILTime::unresolved();

[fs, 2015/04/30 13:24:43]

This seems a bit "early" to handle this? Not entirely sure what is actually
being fixed here...

[Shanmuga Pandi, 2015/04/30 13:42:57]

Basically, I am trying to ignore the restart of animation if animation already
ran and completed. So I just returned false. Anyway m_nextProgressTime =
SMILTime::unresolved(); may not seems to be needed.

[fs, 2015/04/30 13:53:42]

Yes, I got that bit. =)
I suspect the problem is really that when a new instance time is added, that a
new interval is computed up front - and that interval should not be valid per
'restart'.

[Shanmuga Pandi, 2015/04/30 14:03:00]

Sorry. Could you give some live example or jsfiddle for this scenario to
understand it better? 

[fs, 2015/04/30 14:05:07]

I think your testcase would should exactly that. I think the relevant code is in
SVGSMILElement::beginListChanged.

+        return false;
+    }
+
     if (elapsed < m_interval.begin) {
         ASSERT(m_activeState != Active);
         bool isFrozen = (m_activeState == Frozen);