gtk: fix more fullscreen bugs

1. hide/show titlebar widget when entering/exiting full screen
2. don't show bookmark bar when in fullscreen mode

BUG=97177
TEST=manual -- 1. Open new tab. 2. Full screen. 3. click on a link in the new tab page. 4. You shouldn't see a line at the top.

Review URL: http://codereview.chromium.org/8414014

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@107999 0039d316-1c4b-4281-b951-d872f2087c98
2 files changed