Initial implementation of dedupping search provider's URLs.
There are two main sources of such URLs:
(1) search provider itself
(2) history URL providers (after visiting a previously suggested URL).
A search provider URL may contain time/position specific CGI params,
which if left, may prevent from dedupping.
BUG=146551
TEST=AutocompleteResultTest::SortAndCullDuplicateSearchURLs
Review URL: https://chromiumcodereview.appspot.com/11198074
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@164790 0039d316-1c4b-4281-b951-d872f2087c98
14 files changed
