Makes ScreenMus not check that displays are non-empty

Makes ScreenMus not check that displays are non-empty

WaitForIncomingMethodCall can return in the case of the pipe being
broken (say mus is going down). Adds code to handle that case.

BUG=594600
TEST=none
R=ben@chromium.org

Committed: https://crrev.com/02bf716e8ebff39a2a8c0230bfa621bdbec24683
Cr-Commit-Position: refs/heads/master@{#388696}

[Ben Goodger (Google), 2016-04-21 04:08:06]

lgtm

[sky, 2016-04-21 04:25:07]

The CQ bit was checked by sky@chromium.org

[commit-bot: I haz the power, 2016-04-21 04:25:17]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1912523002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1912523002/1

[commit-bot: I haz the power, 2016-04-21 04:56:25]

Committed patchset #1 (id:1)

[kjellander_chromium, 2016-04-21 07:50:00]

A revert of this CL (patchset #1 id:1) has been created in
https://codereview.chromium.org/1905893002/ by kjellander@chromium.org.

The reason for reverting is: Speculative revert for failing interactive_ui_tests
on Linux Chromium OS ASan LSan Tests (1), starting with
https://build.chromium.org/p/chromium.memory/builders/Linux%20Chromium%20OS%2...

Failure:
[ RUN      ] DragDropTest.DragDropAcrossMultiDisplay
Xlib:  extension "RANDR" missing on display ":9".
[9809:9809:0420/230942:21040728698:INFO:lock_state_controller.cc(95)]
Constructing LockStateController instance 0x61600006c980
Xlib:  extension "RANDR" missing on display ":9".
../../ash/drag_drop/drag_drop_interactive_uitest.cc:153: Failure
Value of: target_view->dropped()
  Actual: false
Expected: true
[9809:9809:0420/230942:21040854605:INFO:lock_state_controller.cc(101)]
Destroying LockStateController instance 0x61600006c980
[  FAILED  ] DragDropTest.DragDropAcrossMultiDisplay (231 ms)
.

[commit-bot: I haz the power, 2016-04-22 19:31:39]

Description was changed from

==========
Makes ScreenMus not check that displays are non-empty

WaitForIncomingMethodCall can return in the case of the pipe being
broken (say mus is going down). Adds code to handle that case.

BUG=594600
TEST=none
R=ben@chromium.org
==========

to

==========
Makes ScreenMus not check that displays are non-empty

WaitForIncomingMethodCall can return in the case of the pipe being
broken (say mus is going down). Adds code to handle that case.

BUG=594600
TEST=none
R=ben@chromium.org

Committed: https://crrev.com/02bf716e8ebff39a2a8c0230bfa621bdbec24683
Cr-Commit-Position: refs/heads/master@{#388696}
==========

[commit-bot: I haz the power, 2016-04-22 19:31:40]

Patchset 1 (id:??) landed as
https://crrev.com/02bf716e8ebff39a2a8c0230bfa621bdbec24683
Cr-Commit-Position: refs/heads/master@{#388696}