Merge "Move nulling of nextFrameCallback" into pi-dev am: e4e9ee79

                }

                useAsyncReport = true;

                mAttachInfo.mThreadedRenderer.draw(mView, mAttachInfo, this, mNextRtFrameCallback);

                // draw(...) might invoke post-draw, which might register the next callback already.

                final FrameDrawingCallback callback = mNextRtFrameCallback;

                mNextRtFrameCallback = null;

                mAttachInfo.mThreadedRenderer.draw(mView, mAttachInfo, this, callback);

            } else {

                // If we get here with a disabled & requested hardware renderer, something went

                // wrong (an invalidate posted right before we destroyed the hardware surface