Revert GTK part of 196322: "Omnibox: Show beginning of the text on focus loss"
196322 (Omnibox: Show beginning of the text on focus loss) introduced a bug in GTK. Since we're moving away from GTK, we'd rather revert to the old behavior than finding someone to debug it.
BUG=235820
TEST=Open GTK chrome, select text in Omnibox, right click, the selected text shouldn't be deselected.
Review URL: https://chromiumcodereview.appspot.com/
14135012
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@197523 0039d316-1c4b-4281-b951-d872f2087c98