Retrieve per host storage usage from QuotaManager.

R=kinuko@chromium.org
BUG=none
TEST=QuotaManagerTest.GetUsage

Review URL: http://codereview.chromium.org/8079004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@103921 0039d316-1c4b-4281-b951-d872f2087c98
bool SortByHost(const GURL& lhs, const GURL& rhs) {
  return net::GetHostOrSpecFromURL(lhs) > net::GetHostOrSpecFromURL(rhs);
}

bool SortByHost(const GURL& lhs, const GURL& rhs) {
  return net::GetHostOrSpecFromURL(lhs) > net::GetHostOrSpecFromURL(rhs);
}
