[SVG] Interval should not be created if a value in begin-value-list doesn't have a matching value i…

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 91c3499ae4422730e5d30c2215893bdfdaf5dfb4..13bfae956efa042fc51f4adf6a46d7530199bf2a 100644
--- a/Source/core/svg/animation/SVGSMILElement.cpp
+++ b/Source/core/svg/animation/SVGSMILElement.cpp
@@ -761,7 +761,7 @@ SMILTime SVGSMILElement::findInstanceTime(BeginOrEnd beginOrEnd, SMILTime minimu
         return SMILTime::unresolved();
 
     if (currentTime < minimumTime)
-        return beginOrEnd == Begin ? SMILTime::unresolved() : SMILTime::indefinite();
+        return SMILTime::unresolved();
     if (currentTime > minimumTime)
         return currentTime;
 
@@ -872,7 +872,7 @@ void SVGSMILElement::resolveFirstInterval()
     }
 }
 
-void SVGSMILElement::resolveNextInterval(bool notifyDependents)
+bool SVGSMILElement::resolveNextInterval(bool notifyDependents)
 {
     SMILTime begin;
     SMILTime end;
@@ -885,7 +885,10 @@ void SVGSMILElement::resolveNextInterval(bool notifyDependents)
         if (notifyDependents)
             notifyDependentsIntervalChanged(NewInterval);
         m_nextProgressTime = min(m_nextProgressTime, m_intervalBegin);
+        return true;
     }
+
+    return false;
 }
 
 SMILTime SVGSMILElement::nextProgressTime() const
@@ -984,13 +987,15 @@ void SVGSMILElement::seekToIntervalCorrespondingToTime(SMILTime elapsed)
         if (nextBegin < m_intervalEnd && elapsed >= nextBegin) {
             // End current interval, and start a new interval from the 'nextBegin' time.
             m_intervalEnd = nextBegin;
-            resolveNextInterval(false);
+            if (!resolveNextInterval(false))
+                break;
             continue;
         }
 
         // If the desired 'elapsed' time is past the current interval, advance to the next.
         if (elapsed >= m_intervalEnd) {
-            resolveNextInterval(false);
+            if (!resolveNextInterval(false))
+                break;
             continue;
         }