4118304e5c
The ClearRequestFlags() method iterates over layer_stack_ instead of layer_set_. This causes a use-after-free since DestroyLayer() removes layer from layer_set_ only. Besides that, the method need not be virtual and has a redundant loop. This change removes the ClearRequestFlags() method and clears flags in an existing loop. Present() bails out if layer_set_ is empty or a shutdown is pending. Since layers could have been destroyed before Present(), ideally bailing out on re-validation has a higher priority over the rest. Change-Id: Ic7b31bbd07a22b8df47fccb2024b3415ab3a559b CRs-fixed: 2165926