Implicitly detect the use of --in-process-webgl by the absence of a display connection in x11_util, and open our own display instead. This makes --in-process-webgl work on Linux again.
Implicitly detect the use of --in-process-webgl by the absence of a
display connection in x11_util, and open our own display instead.
This makes --in-process-webgl work on Linux again.

Tested by running some WebGL and accelerated 2D Canvas content with
--in-process-webgl and --disable-accelerated-compositing.

BUG=55152
TEST=none

Review URL: http://codereview.chromium.org/6041002

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@69892 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser