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By reducing the time waited between sending a Autocomplete request and
SearchProvider sending the request to mocked suggest server.

The speeds up the wall time of running SearchProvider test from 30 seconds to 20 seconds.

BUG=


Review URL: https://chromiumcodereview.appspot.com/13461012

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@192584 0039d316-1c4b-4281-b951-d872f2087c98