Relates to  issue 645291  NativeWidgetMus::SetBounds() should support moving widgets between displays.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/aecdb0fbad617472bd1d5d393ea89b9257fdca66

commit aecdb0fbad617472bd1d5d393ea89b9257fdca66
Author: sky <sky@chromium.org>
Date: Thu Sep 15 22:14:28 2016

Wires up WmWindowMus::SetBoundsInScreen()

As part of this I realized SetLockedToRoot and
SetDescendantsStayInSameRootWindow meant the same thing, so I nuked
the later.

In order to test this I need multiple display support, which isn't
quite working yet (in particular shutdown is currently
problematic).

BUG= 615552 
TEST=none
R=jamescook@chromium.org

Review-Url: https://codereview.chromium.org/2344783002
Cr-Commit-Position: refs/heads/master@{#419010}

[modify] https://crrev.com/aecdb0fbad617472bd1d5d393ea89b9257fdca66/ash/aura/wm_window_aura.cc
[modify] https://crrev.com/aecdb0fbad617472bd1d5d393ea89b9257fdca66/ash/aura/wm_window_aura.h
[modify] https://crrev.com/aecdb0fbad617472bd1d5d393ea89b9257fdca66/ash/common/wm/window_positioning_utils.cc
[modify] https://crrev.com/aecdb0fbad617472bd1d5d393ea89b9257fdca66/ash/common/wm/window_positioning_utils.h
[modify] https://crrev.com/aecdb0fbad617472bd1d5d393ea89b9257fdca66/ash/common/wm_root_window_controller.cc
[modify] https://crrev.com/aecdb0fbad617472bd1d5d393ea89b9257fdca66/ash/common/wm_window.h
[modify] https://crrev.com/aecdb0fbad617472bd1d5d393ea89b9257fdca66/ash/display/screen_position_controller.cc
[modify] https://crrev.com/aecdb0fbad617472bd1d5d393ea89b9257fdca66/ash/extended_desktop_unittest.cc
[modify] https://crrev.com/aecdb0fbad617472bd1d5d393ea89b9257fdca66/ash/mus/bridge/wm_window_mus.cc
[modify] https://crrev.com/aecdb0fbad617472bd1d5d393ea89b9257fdca66/ash/mus/bridge/wm_window_mus.h
[modify] https://crrev.com/aecdb0fbad617472bd1d5d393ea89b9257fdca66/ash/wm/window_properties.cc
[modify] https://crrev.com/aecdb0fbad617472bd1d5d393ea89b9257fdca66/ash/wm/window_properties.h

This is fixed.