Initialize compositor early on so the rest of the code can assumed it is
already initialized.

BUG=162312
TEST=Chrome, content shell and test shell should still work.

Review URL: https://chromiumcodereview.appspot.com/11280097

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@169716 0039d316-1c4b-4281-b951-d872f2087c98
5 files changed