Bug 1169690 - Accelerate flings correctly in the presence of overscroll handoff. r=kats

--HG--
extra : source : bcb4719f55c2840a88c99fa2f1019c2796514087

gfx/layers/apz/src/APZCTreeManager.cpp

@@ -1254,10 +1254,9 @@ APZCTreeManager::DispatchFling(AsyncPanZoomController* aPrev,
 
     transformedVelocity = endPoint - startPoint;
 
-    bool handoff = (startIndex < 1) ? aHandoff : true;
     if (current->AttemptFling(transformedVelocity,
                               aOverscrollHandoffChain,
-                              handoff)) {
+                              aHandoff)) {
       return true;
     }
   }