Handle view-source: URLs better in the history providers.
This makes fixup strip the "http://" scheme back out when the user didn't type
it, even when it was inserted after "view-source:".
This also fixes highlighting of such input in the resulting matches.
BUG=286451
TEST=Typing "view-source:x" doesn't crash, and highlights correctly in the dropdown
R=beaudoin@chromium.org
Review URL: https://codereview.chromium.org/
23458032
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@222097 0039d316-1c4b-4281-b951-d872f2087c98