Disable window_manager_apptests again...

Disable window_manager_apptests again...

I fixed local crashes in https://codereview.chromium.org/1107133002
The bot fails on gl_surface init, which I can't repro:
  http://build.chromium.org/p/chromium.mojo/builders/Chromium%20Mojo%20Linux/builds/4898/steps/app_tests/logs/stdio

[0427/144427:ERROR:gl_surface_x11.cc(98)] XOpenDisplay failed.
[0427/144427:ERROR:gl_surface_x11.cc(62)] NativeViewGLSurfaceOSMesa::InitializeOneOff failed.
[0427/144427:FATAL:gl_surface.cc(136)] Check failed: InitializeOneOffImplementation( impl, fallback_to_osmesa, gpu_service_logging, disable_gl_drawing).

BUG=480040
TEST=Bot goes green again.
TBR=sky@chromium.org

Committed: https://crrev.com/63b2a20daf725ae044410d92a85a5fbebec27bea
Cr-Commit-Position: refs/heads/master@{#327159}

[msw, 2015-04-27 22:23:47]

Hey Scott, please take a look as you have time; thanks.

[msw, 2015-04-27 22:23:51]

The CQ bit was checked by msw@chromium.org

[commit-bot: I haz the power, 2015-04-27 22:24:10]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1106363002/1

[commit-bot: I haz the power, 2015-04-27 22:35:29]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-04-27 22:36:32]

Patchset 1 (id:??) landed as
https://crrev.com/63b2a20daf725ae044410d92a85a5fbebec27bea
Cr-Commit-Position: refs/heads/master@{#327159}