Bug 1230552 - Introduce a helper AsyncPanZoomController::CurrentInputBlock(). r=kats

--HG--
extra : commitid : tjvQ9vFjQG
extra : rebase_source : ca1e6210602ebade929a1c2864a1c7de48bbd84b

gfx/layers/apz/src/AsyncPanZoomController.cpp

@@ -2183,7 +2183,7 @@ void AsyncPanZoomController::HandlePanningWithTouchAction(double aAngle) {
 void AsyncPanZoomController::HandlePanning(double aAngle) {
   ReentrantMonitorAutoEnter lock(mMonitor);
   RefPtr<const OverscrollHandoffChain> overscrollHandoffChain =
-    GetInputQueue()->CurrentBlock()->GetOverscrollHandoffChain();
+    CurrentInputBlock()->GetOverscrollHandoffChain();
   bool canScrollHorizontal = !mX.IsAxisLocked() &&
     overscrollHandoffChain->CanScrollInDirection(this, Layer::HORIZONTAL);
   bool canScrollVertical = !mY.IsAxisLocked() &&
@@ -3432,6 +3432,12 @@ void AsyncPanZoomController::ZoomToRect(CSSRect aRect) {
   }
 }
 
+CancelableBlockState*
+AsyncPanZoomController::CurrentInputBlock() const
+{
+  return GetInputQueue()->CurrentBlock();
+}
+
 TouchBlockState*
 AsyncPanZoomController::CurrentTouchBlock() const
 {

gfx/layers/apz/src/AsyncPanZoomController.h

@@ -824,6 +824,7 @@ private:
   void CancelAnimationAndGestureState();
 
   RefPtr<InputQueue> mInputQueue;
+  CancelableBlockState* CurrentInputBlock() const;
   TouchBlockState* CurrentTouchBlock() const;
   bool HasReadyTouchBlock() const;