DevTools: [CodeMirror] CodeMirror is stuck on startup
DevTools: [CodeMirror] CodeMirror is stuck on startup

Fix CodeMirrorTextEditor to forward focus to CodeMirror instance.

BUG=

Review URL: https://chromiumcodereview.appspot.com/13995004

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@148286 bbb929c8-8fbe-4397-9dbb-9b2b20218538

primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs