Introduce incognito preference settings.

chrome/test/testing_pref_service.h

 // 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.
 
 #ifndef CHROME_TEST_TESTING_PREF_SERVICE_H_
 #define CHROME_TEST_TESTING_PREF_SERVICE_H_
 #pragma once
 
+#include "base/ref_counted.h"
 #include "chrome/browser/prefs/pref_service.h"
 
+class ExtensionPrefStore;
 class TestingPrefStore;
 
 // A PrefService subclass for testing. It operates totally in memory and
 // provides additional API for manipulating preferences at the different levels
 // (managed, extension, user) conveniently.
 class TestingPrefService : public PrefService {
  public:
+  virtual ~TestingPrefService();
+
   // Create an empty instance.
-  TestingPrefService();
-  virtual ~TestingPrefService() {}
+  static TestingPrefService* CreateTestingPrefService();

[Mattias Nissler (ping if slow), 2010/12/20 14:50:02]

Introducing a factory function here makes it harder to work with
TestingPrefService, which somewhat defeats its purpose.

As discussed offline, how about something along these lines:

class TestingPrefServiceBase : public PrefService {
 public:
  // Existing TestingPrefService interface goes here.

 protected:
  TestingPrefServiceBase(PrefStore* managed, ...)
      : PrefService(managed, ...),
        managed_(managed) {
  }

 private:
  scoped_refptr<PrefStore> managed_;
};

class TestingPrefService : public TestingPrefServiceBase {
 public:
  TestingPrefService()
    : TestingPrefServiceBase(new TestingPrefStore(), ...) {
  }
};

[battre, 2010/12/21 18:51:59]

Done.

 
   // Read the value of a preference from the managed layer. Returns NULL if the
   // preference is not defined at the managed layer.
   const Value* GetManagedPref(const char* path) const;
 
   // Set a preference on the managed layer and fire observers if the preference
   // changed. Assumes ownership of |value|.
   void SetManagedPref(const char* path, Value* value);
 
   // Clear the preference on the managed layer and fire observers if the
   // preference has been defined previously.
   void RemoveManagedPref(const char* path);
 
   // Similar to the above, but for user preferences.
   const Value* GetUserPref(const char* path) const;
   void SetUserPref(const char* path, Value* value);
   void RemoveUserPref(const char* path);
 
+  scoped_refptr<ExtensionPrefStore> GetExtensionPrefs();
+ protected:
+  TestingPrefService(
+      scoped_refptr<TestingPrefStore> managed_platform_prefs,
+      scoped_refptr<TestingPrefStore> device_management_prefs,
+      scoped_refptr<ExtensionPrefStore> extension_prefs,
+      scoped_refptr<TestingPrefStore> user_prefs);
+
  private:
   // Reads the value of the preference indicated by |path| from |pref_store|.
   // Returns NULL if the preference was not found.
-  const Value* GetPref(TestingPrefStore* pref_store, const char* path) const;
+  const Value* GetPref(scoped_refptr<TestingPrefStore> pref_store,
+                       const char* path) const;
 
   // Sets the value for |path| in |pref_store|.
-  void SetPref(TestingPrefStore* pref_store, const char* path, Value* value);
+  void SetPref(scoped_refptr<TestingPrefStore> pref_store,
+               const char* path, Value* value);
 
   // Removes the preference identified by |path| from |pref_store|.
-  void RemovePref(TestingPrefStore* pref_store, const char* path);
+  void RemovePref(scoped_refptr<TestingPrefStore> pref_store, const char* path);
 
   // Pointers to the pref stores our value store uses.
-  TestingPrefStore* managed_platform_prefs_;  // weak
-  TestingPrefStore* device_management_prefs_;  // weak
-  TestingPrefStore* user_prefs_;  // weak
+  scoped_refptr<TestingPrefStore> managed_platform_prefs_;
+  scoped_refptr<TestingPrefStore> device_management_prefs_;
+  scoped_refptr<ExtensionPrefStore> extension_prefs_;
+  scoped_refptr<TestingPrefStore> user_prefs_;
 
   DISALLOW_COPY_AND_ASSIGN(TestingPrefService);
 };
 
 #endif  // CHROME_TEST_TESTING_PREF_SERVICE_H_