Add ability to change default pref values, and use in BrowserInstantController.

chrome/browser/content_settings/content_settings_pref_provider_unittest.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/browser/content_settings/content_settings_pref_provider.h"
 
 #include "base/auto_reset.h"
 #include "base/command_line.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop.h"
@@ skipping 121 matching lines @@
 TEST_F(PrefProviderTest, Incognito) {
   PersistentPrefStore* user_prefs = new TestingPrefStore();
   OverlayUserPrefStore* otr_user_prefs =
       new OverlayUserPrefStore(user_prefs);
 
   PrefServiceMockBuilder builder;
   builder.WithUserPrefs(user_prefs);
   scoped_refptr<PrefRegistrySyncable> registry(new PrefRegistrySyncable);
   PrefServiceSyncable* regular_prefs = builder.CreateSyncable(registry);
 
-  chrome::RegisterUserPrefs(regular_prefs, registry);
+  chrome::RegisterUserPrefs(registry);
 
   builder.WithUserPrefs(otr_user_prefs);
   scoped_refptr<PrefRegistrySyncable> otr_registry(new PrefRegistrySyncable);
   PrefServiceSyncable* otr_prefs = builder.CreateSyncable(otr_registry);
 
-  chrome::RegisterUserPrefs(otr_prefs, otr_registry);
+  chrome::RegisterUserPrefs(otr_registry);
 
   TestingProfile::Builder profile_builder;
   profile_builder.SetPrefService(make_scoped_ptr(regular_prefs));
   scoped_ptr<TestingProfile> profile = profile_builder.Build();
 
   TestingProfile::Builder otr_profile_builder;
   otr_profile_builder.SetPrefService(make_scoped_ptr(otr_prefs));
   TestingProfile* otr_profile = otr_profile_builder.Build().release();
 
   otr_profile->set_incognito(true);
@@ skipping 230 matching lines @@
     DictionaryValue* mutable_settings = update.Get();
     mutable_settings->SetWithoutPathExpansion("www.example.com,*",
                                               new base::DictionaryValue());
   }
   EXPECT_TRUE(observer.notification_received());
 
   provider.ShutdownOnUIThread();
 }
 
 }  // namespace content_settings