Allow use of EGL in browser tests with --use-gl=egl.

Allow use of EGL in browser tests with --use-gl=egl.

Browser tests on some ARM devices need to use EGL, but our browser tests
do not currently allow the use of --use-gl and they default to GLX.

Allow the use of --use-gl, but have browser tests override it with the
--override-use-gl-with-osmesa-for-tests flag by default, this ensures
that --use-gl on its own does not change the behaviour of the tests.

The --use-gpu-in-tests flag allows the --use-gl flag to take effect, as
the browser tests will try to use hardware gpu then.

R=piman
BUG=364729
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=267882

[piman, 2014-05-01 20:41:20]

https://codereview.chromium.org/261013004/diff/1/content/public/test/browser_...
File content/public/test/browser_test_base.cc (right):

https://codereview.chromium.org/261013004/diff/1/content/public/test/browser_...
content/public/test/browser_test_base.cc:221:
command_line->AppendSwitch(switches::kOverrideUseGLWithOSMesaForTests);
You need to add this to GpuProcessHost so that it's forwarded to the GPU process

[danakj, 2014-05-01 20:53:49]

https://codereview.chromium.org/261013004/diff/1/content/public/test/browser_...
File content/public/test/browser_test_base.cc (right):

https://codereview.chromium.org/261013004/diff/1/content/public/test/browser_...
content/public/test/browser_test_base.cc:221:
command_line->AppendSwitch(switches::kOverrideUseGLWithOSMesaForTests);
On 2014/05/01 20:41:20, piman wrote:
> You need to add this to GpuProcessHost so that it's forwarded to the GPU
process

Done.

[piman, 2014-05-01 20:55:34]

lgtm

https://codereview.chromium.org/261013004/diff/20001/ui/gl/gl_switches.cc
File ui/gl/gl_switches.cc (right):

https://codereview.chromium.org/261013004/diff/20001/ui/gl/gl_switches.cc#new...
ui/gl/gl_switches.cc:81: kOverrideUseGLWithOSMesaForTests,
o_O

[danakj, 2014-05-02 16:50:51]

The CQ bit was checked by danakj@chromium.org

[commit-bot: I haz the power, 2014-05-02 16:52:48]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/danakj@chromium.org/261013004/40001

[commit-bot: I haz the power, 2014-05-02 18:36:04]

Change committed as 267882