Add hooks for GL_EXT_debug_markers for Skia

Add hooks for GL_EXT_debug_markers for Skia

BUG=

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=256911

[egdaniel, 2014-03-12 13:50:34]

PTAL

[piman, 2014-03-13 00:29:22]

lgtm

https://codereview.chromium.org/197393002/diff/1/ui/gl/gl_bindings_skia_in_pr...
File ui/gl/gl_bindings_skia_in_process.cc (right):

https://codereview.chromium.org/197393002/diff/1/ui/gl/gl_bindings_skia_in_pr...
ui/gl/gl_bindings_skia_in_process.cc:350: glInsertEventMarkerEXT(length,
marker);
nit: 2 space indent (same below).

https://codereview.chromium.org/197393002/diff/1/ui/gl/gl_bindings_skia_in_pr...
ui/gl/gl_bindings_skia_in_process.cc:350: glInsertEventMarkerEXT(length,
marker);
Note: this has different behavior than the command-buffer version.
For the in-process case, this would send the marker to GL.
For the command buffer case, this would be handled at the command-buffer level,
fed to about:tracing.

This is not necessarily a problem, just making sure we have the right
expectations.

[egdaniel, 2014-03-13 13:32:30]

The CQ bit was checked by egdaniel@google.com

[commit-bot: I haz the power, 2014-03-13 13:32:31]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/egdaniel@google.com/197393002/1

[egdaniel, 2014-03-13 13:36:23]

The CQ bit was unchecked by egdaniel@google.com

[egdaniel, 2014-03-13 17:58:26]

The CQ bit was checked by egdaniel@google.com

[commit-bot: I haz the power, 2014-03-13 18:00:46]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/egdaniel@google.com/197393002/20001

[commit-bot: I haz the power, 2014-03-13 20:19:17]

Change committed as 256911