Remove some chrome-specific methods from content::WebUI.

HideFavicon wasn't used anymore. This is probably because now we show a search icon there.
FocusLocationBarByDefault can just be implemented in Browser (like Instant).
HideURL can just be implemented in ToolbarModelImpl (again, like Instant).
Review URL: https://codereview.chromium.org/14080004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@193998 0039d316-1c4b-4281-b951-d872f2087c98
16 files changed