Change NavigationController::LoadURL to take a Referrer class instead of a GURL as referrer

Change NavigationController::LoadURL to take a Referrer class instead of a GURL as referrer

BUG=105028
TEST=no functional change

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=112968

[jochen (gone - plz use gerrit), 2011-12-02 22:22:48]

please review

I change the type of the referrer parameter, and update all call sites

most is GURL() -> content::Referrer()

If there's a real referrer, I create the Referrer object with the default policy

[jam, 2011-12-04 23:02:34]

Avi: please review, thanks

[Avi (use Gerrit), 2011-12-05 02:34:56]

Exiting early; same basic question as in
http://codereview.chromium.org/8784006/:

I thought we wrapped all WebKit types in glue and didn't allow them in content
or chrome.

[Avi (use Gerrit), 2011-12-05 03:29:59]

lgtm