Merge "Transfer focus from the current focused window for two-finger scroll"

        mTaskPositioner = new TaskPositioner(this);

        mTaskPositioner.register(display);

        mInputMonitor.updateInputWindowsLw(true /*force*/);

        // We need to grab the touch focus so that the touch events during the

        // resizing/scrolling are not sent to the app. 'win' is the main window

        // of the app, it may not have focus since there might be other windows

        // on top (eg. a dialog window).

        WindowState transferFocusFromWin = win;

        if (mCurrentFocus != null && mCurrentFocus != win

                && mCurrentFocus.mAppToken == win.mAppToken) {

            transferFocusFromWin = mCurrentFocus;

        }

        if (!mInputManager.transferTouchFocus(

                win.mInputChannel, mTaskPositioner.mServerChannel)) {

                transferFocusFromWin.mInputChannel, mTaskPositioner.mServerChannel)) {

            Slog.e(TAG_WM, "startPositioningLocked: Unable to transfer touch focus");

            mTaskPositioner.unregister();

            mTaskPositioner = null;