Devtools Animations: Update timeline reset condition

Source/core/inspector/InspectorAnimationAgent.h

Index: Source/core/inspector/InspectorAnimationAgent.h
diff --git a/Source/core/inspector/InspectorAnimationAgent.h b/Source/core/inspector/InspectorAnimationAgent.h
index c49690e0ab736feff74a1e1d40283b124632093e..cafdafa62826bfdc47a3d2b914ae354a020c16b0 100644
--- a/Source/core/inspector/InspectorAnimationAgent.h
+++ b/Source/core/inspector/InspectorAnimationAgent.h
@@ -69,6 +69,7 @@ private:
     RawPtrWillBeMember<InspectorDOMAgent> m_domAgent;
     WillBeHeapHashMap<String, RefPtrWillBeMember<Animation>> m_idToAnimation;
     WillBeHeapHashMap<String, AnimationType> m_idToAnimationType;
+    double m_latestStartTime;
 };
 
 }