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
  void GetLRUOrigin(StorageType type) {
    lru_origin_ = GURL();
    quota_manager_->GetLRUOrigin(type,
        callback_factory_.NewCallback(&QuotaManagerTest::DidGetLRUOrigin));
  }

  void GetLRUOrigin(StorageType type) {
    lru_origin_ = GURL();
    quota_manager_->GetLRUOrigin(type,
        callback_factory_.NewCallback(&QuotaManagerTest::DidGetLRUOrigin));
  }
