Merge 136205 - Support scheme-setting for GoogleURLTracker.

Merge 136205 - Support scheme-setting for GoogleURLTracker.

This switches the searchdomaincheck request from format=domain (".google.com") to format=url ("http://www.google.com/").  This in turn allows the server to direct us to use HTTPS searches by default, which should save a redirect on each search over the current situation when it's applicable.

We hide this detail from the user; we continue to prompt about TLD changes, but we don't prompt about scheme changes.

BUG=96636
TEST=Make sure the cookie store has cookies such that you get HTTPS search by default on Google.  After this patch, doing a search should not involve a redirect through HTTP.
Review URL: https://chromiumcodereview.appspot.com/10382091

TBR=pkasting@chromium.org
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=137286