Introduce incognito preference settings.

chrome/browser/prefs/pref_change_registrar_unittest.cc

 // Copyright (c) 2010 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/browser/extensions/extension_pref_store.h"
 #include "chrome/browser/prefs/pref_change_registrar.h"
+#include "chrome/browser/prefs/testing_pref_store.h"
 #include "chrome/common/notification_details.h"
 #include "chrome/common/notification_observer_mock.h"
 #include "chrome/common/notification_source.h"
 #include "chrome/common/notification_type.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/test/testing_pref_service.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using testing::Mock;
 using testing::Eq;
 
 namespace {
 
 // A mock provider that allows us to capture pref observer changes.
 class MockPrefService : public TestingPrefService {
  public:
-  MockPrefService() {}
+  MockPrefService()
+      : TestingPrefService(new TestingPrefStore(),
+                           new TestingPrefStore(),
+                           new ExtensionPrefStore(),
+                           new TestingPrefStore()) {
+  }
   virtual ~MockPrefService() {};
 
   MOCK_METHOD2(AddPrefObserver, void(const char*, NotificationObserver*));
   MOCK_METHOD2(RemovePrefObserver, void(const char*, NotificationObserver*));
 };
 
 }  // namespace
 
 class PrefChangeRegistrarTest : public testing::Test {
  public:
@@ skipping 76 matching lines @@
               RemovePrefObserver(Eq(std::string("test.pref.1")), observer()));
   EXPECT_CALL(*service(),
               RemovePrefObserver(Eq(std::string("test.pref.2")), observer()));
   registrar.RemoveAll();
   EXPECT_TRUE(registrar.IsEmpty());
 
   // Explicitly check the expectations now to make sure that the RemoveAll
   // worked (rather than the registrar destructor doing the work).
   Mock::VerifyAndClearExpectations(service());
 }