Use an X event loop in the GPU process on Linux.

Use an X event loop in the GPU process on Linux.

In future patches, X windows will be created in the GPU
process, and events sent to these windows will need to
be forwarded to their parent windows.

Linux uses GTK as the default UI event loop type, but
GTK is not in the GPU process, so the X11 event loop
type is used instead.

BUG=145600
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=222470

[ccameron, 2013-09-10 08:07:01]

This is the next step towards working around the NVIDIA X/GLX window bug.

The step which uses this is as follows
https://codereview.chromium.org/23480056/

[piman, 2013-09-10 17:23:31]

lgtm

[Nico, 2013-09-10 17:29:40]

lgtm

https://codereview.chromium.org/23477050/diff/1/base/message_loop/message_pum...
File base/message_loop/message_pump_x11.h (right):

https://codereview.chromium.org/23477050/diff/1/base/message_loop/message_pum...
base/message_loop/message_pump_x11.h:46: // Returns the UI message pump.
comment now wrong?

[ccameron, 2013-09-10 18:03:27]

Thanks!!

https://codereview.chromium.org/23477050/diff/1/base/message_loop/message_pum...
File base/message_loop/message_pump_x11.h (right):

https://codereview.chromium.org/23477050/diff/1/base/message_loop/message_pum...
base/message_loop/message_pump_x11.h:46: // Returns the UI message pump.
On 2013/09/10 17:29:40, Nico wrote:
> comment now wrong?

Good point -- fixed.

[commit-bot: I haz the power, 2013-09-10 18:06:26]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/ccameron@chromium.org/23477050/1

[commit-bot: I haz the power, 2013-09-10 18:07:31]

Failed to trigger a try job on linux_rel
HTTP Error 400: Bad Request

[commit-bot: I haz the power, 2013-09-10 18:12:12]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/ccameron@chromium.org/23477050/2001

[commit-bot: I haz the power, 2013-09-10 21:49:10]

Retried try job too often on linux_aura for step(s) browser_tests
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=linux_aura...

[ccameron, 2013-09-10 22:05:21]

That's a flake -- DenyingCameraDoesNotCauseStickyDenyForMics has been failing
for ages.

http://build.chromium.org/p/tryserver.chromium/builders/linux_aura

[commit-bot: I haz the power, 2013-09-11 00:21:55]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/ccameron@chromium.org/23477050/2001

[commit-bot: I haz the power, 2013-09-11 04:20:07]

Change committed as 222470