Add DeviceSettingProvider unit tests.

chrome/test/base/testing_browser_process.cc

 // Copyright (c) 2012 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.
 
 #include "chrome/test/base/testing_browser_process.h"
 
 #include "base/string_util.h"
 #include "chrome/browser/google/google_url_tracker.h"
+#include "chrome/browser/metrics/metrics_service.h"
 #include "chrome/browser/notifications/notification_ui_manager.h"
 #include "chrome/browser/policy/browser_policy_connector.h"
 #include "chrome/browser/policy/policy_service_stub.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/prerender/prerender_tracker.h"
 #include "chrome/browser/printing/background_printing_manager.h"
 #include "chrome/browser/printing/print_preview_tab_controller.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/browser/safe_browsing/safe_browsing_service.h"
 #include "content/public/browser/notification_service.h"
@@ skipping 13 matching lines @@
   EXPECT_FALSE(local_state_);
 }
 
 void TestingBrowserProcess::ResourceDispatcherHostCreated() {
 }
 
 void TestingBrowserProcess::EndSession() {
 }
 
 MetricsService* TestingBrowserProcess::metrics_service() {
-  return NULL;
+  return metrics_service_.get();
 }
 
 IOThread* TestingBrowserProcess::io_thread() {
   return io_thread_;
 }
 
 WatchDogThread* TestingBrowserProcess::watchdog_thread() {
   return NULL;
 }
 
@@ skipping 210 matching lines @@
 
 void TestingBrowserProcess::SetBrowserPolicyConnector(
     policy::BrowserPolicyConnector* connector) {
   browser_policy_connector_.reset(connector);
 }
 
 void TestingBrowserProcess::SetSafeBrowsingService(
     SafeBrowsingService* sb_service) {
   sb_service_ = sb_service;
 }
+
+void TestingBrowserProcess::SetMetricsService(MetricsService* service) {
+  metrics_service_.reset(service);
+}