Add enable-renderer-mojo-channel to about:flags

Add enable-renderer-mojo-channel to about:flags

BUG=none
TEST=none
R=darin@chromium.org, jam@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=288138

[Hajime Morrita, 2014-08-07 00:53:32]

On 2014/08/07 00:51:38, morrita wrote:

Could you rubber-stamp this? Just a flag addition.

[darin (slow to review), 2014-08-07 01:20:30]

lgtm

[Hajime Morrita, 2014-08-07 17:13:39]

The CQ bit was checked by morrita@chromium.org

[commit-bot: I haz the power, 2014-08-07 17:14:50]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/morrita@chromium.org/445253002/1

[commit-bot: I haz the power, 2014-08-07 18:43:46]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  win_gpu on tryserver.chromium.gpu
(http://build.chromium.org/p/tryserver.chromium.gpu/builders/win_gpu/builds/43826)
  win8_chromium_rel on tryserver.chromium.win
(http://build.chromium.org/p/tryserver.chromium.win/builders/win8_chromium_rel...)
  win_chromium_compile_dbg on tryserver.chromium.win
(http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_comp...)
  win_chromium_rel on tryserver.chromium.win
(http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_rel/...)
  win_chromium_x64_rel on tryserver.chromium.win
(http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_x64_...)

[commit-bot: I haz the power, 2014-08-07 20:42:16]

Change committed as 288138