Merge "Treat GONE windows as READY for sync" into sc-v2-dev am: b5da127d

        // since a generic WindowContainer only needs to wait for its

        // children to finish and is immediately ready from its own

        // perspective but at the WindowState level we need to wait for ourselves

        // to draw even if the children draw first our don't need to sync, so we start

        // to draw even if the children draw first or don't need to sync, so we start

        // in WAITING state rather than READY.

        mSyncState = SYNC_STATE_WAITING_FOR_DRAW;

        requestRedrawForSync();

        return true;

    }

    @Override

    boolean isSyncFinished() {

        if (mSyncState == SYNC_STATE_WAITING_FOR_DRAW && mViewVisibility == View.GONE) {

            // Don't wait for GONE windows. However, we don't alter the state in case the window

            // becomes un-gone while the syncset is still active.

            return true;

        }

        return super.isSyncFinished();

    }

    boolean finishDrawing(SurfaceControl.Transaction postDrawTransaction) {

        if (mOrientationChangeRedrawRequestTime > 0) {

            final long duration =