Fix for a bug where navigating from the NTP, to an SSL interstitial and then a malware interstitial, the location bar would be empty (instead of showing the malware URL).
Fix for a bug where navigating from the NTP, to an SSL interstitial and then
a malware interstitial, the location bar would be empty (instead of showing
the malware URL).

This happens because when the second interstitial is shown,
TabContents::GetDOMUIForCurrentState() thinks the current DOMUI is the NTP
one, and therefore does not show the URL.
Instead of messing with the complicated logic of GetDOMUIForCurrentState(),
I made us always show the URL for interstitial, as it should be the case.

BUG=26082
TEST=See bug steps. Also make sure navigating to SLL and malware interstitial
     works as expected and that the right URL is displayed everytime. Test
     that clickicng Continue/Revert as well as navigating from an interstitial
     works and that the right URL is displayed.

Review URL: http://codereview.chromium.org/384013

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@31941 0039d316-1c4b-4281-b951-d872f2087c98

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