Add SimpleGeolocationTest unit test.

chrome/browser/chromeos/geolocation/simple_geolocation_provider.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_CHROMEOS_GEOLOCATION_SIMPLE_GEOLOCATION_PROVIDER_H_
 #define CHROME_BROWSER_CHROMEOS_GEOLOCATION_SIMPLE_GEOLOCATION_PROVIDER_H_
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_vector.h"
@@ skipping 23 matching lines @@
 
   // Initiates new request (See SimpleGeolocationRequest for parameters
   // description.)
   void RequestGeolocation(base::TimeDelta timeout,
                           SimpleGeolocationRequest::ResponseCallback callback);
 
   // Returns default geolocation service URL.
   static GURL DefaultGeolocationProviderURL();
 
  private:
+  friend class TestGeolocationAPIURLFetcherCallback;
+
   // Geolocation response callback. Deletes request from requests_.
   void OnGeolocationResponse(
       SimpleGeolocationRequest* request,
       SimpleGeolocationRequest::ResponseCallback callback,
       const Geoposition& geoposition,
       bool server_error,
       const base::TimeDelta elapsed);
 
   scoped_refptr<net::URLRequestContextGetter> url_context_getter_;
 
   // URL of the Google Maps Geolocation API.
   const GURL url_;
 
   // Requests in progress.
   // SimpleGeolocationProvider owns all requests, so this vector is deleted on
   // destroy.
   ScopedVector<SimpleGeolocationRequest> requests_;
 
   // Creation and destruction should happen on the same thread.
   base::ThreadChecker thread_checker_;
 
   DISALLOW_COPY_AND_ASSIGN(SimpleGeolocationProvider);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_GEOLOCATION_SIMPLE_GEOLOCATION_PROVIDER_H_