Allow --ppapi-out-of-process in Guest mode on Chrome OS.
Allow --ppapi-out-of-process in Guest mode on Chrome OS.

This can be useful for testing and poses no danger to Guest mode.

TEST=Add a plugin to /opt/google/chrome/pepper/; add --ppapi-out-of-process to /sbin/session_manager_setup.sh; enter Guest mode; visit a page that instantiates the plugin; observe that it is running out-of-process in Task Manager.


Review URL: https://chromiumcodereview.appspot.com/11308044

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@168054 0039d316-1c4b-4281-b951-d872f2087c98

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