Merge "Calculate letterbox against task displayed-bounds in multi-window" into qt-dev

                mLetterbox.attachInput(w);

            }

            getPosition(mTmpPoint);

            // Get the bounds of the "space-to-fill". We union the Task and the Stack bounds here

            // to handle both split window (where task-bounds can be larger) and orientation

            // letterbox (where the task is letterboxed within stack).

            Rect spaceToFill = getTask().getBounds();

            if (getStack() != null) {

                spaceToFill.union(getStack().getBounds());

            }

            // Get the bounds of the "space-to-fill". In multi-window mode, the task-level

            // represents this. In fullscreen-mode, the stack does (since the orientation letterbox

            // is also applied to the task).

            Rect spaceToFill = (inMultiWindowMode() || getStack() == null)

                    ? getTask().getDisplayedBounds() : getStack().getDisplayedBounds();

            mLetterbox.layout(spaceToFill, w.getFrameLw(), mTmpPoint);

        } else if (mLetterbox != null) {

            mLetterbox.hide();