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

chrome/browser/extensions/extension_service_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/extensions/extension_service_unittest.h"
 
 #include <algorithm>
 #include <set>
 #include <vector>
 
@@ skipping 430 matching lines @@
     const base::FilePath& pref_file,
     const base::FilePath& extensions_install_dir,
     bool autoupdate_enabled) {
   TestingProfile::Builder profile_builder;
   // Create a PrefService that only contains user defined preference values.
   PrefServiceMockBuilder builder;
   builder.WithUserFilePrefs(
       pref_file, loop_.message_loop_proxy());
   scoped_refptr<PrefRegistrySyncable> registry(new PrefRegistrySyncable);
   scoped_ptr<PrefServiceSyncable> prefs(builder.CreateSyncable(registry));
-  chrome::RegisterUserPrefs(prefs.get(), registry);
+  chrome::RegisterUserPrefs(registry);
   profile_builder.SetPrefService(prefs.Pass());
   profile_builder.SetPath(profile_path);
   profile_ = profile_builder.Build();
 
   service_ = static_cast<extensions::TestExtensionSystem*>(
       ExtensionSystem::Get(profile_.get()))->CreateExtensionService(
           CommandLine::ForCurrentProcess(),
           extensions_install_dir,
           autoupdate_enabled);
   service_->SetFileTaskRunnerForTesting(loop_.message_loop_proxy());
@@ skipping 5396 matching lines @@
   EXPECT_FALSE(extensions::HasExternalInstallError(service_));
   EXPECT_FALSE(service_->IsExtensionEnabled(good_crx));
   EXPECT_TRUE(service_->IsExtensionEnabled(page_action));
 
   ExtensionPrefs* prefs = service_->extension_prefs();
   EXPECT_NE(0, prefs->GetDisableReasons(good_crx) &
       Extension::DISABLE_SIDELOAD_WIPEOUT);
   EXPECT_EQ(0, prefs->GetDisableReasons(page_action) &
       Extension::DISABLE_SIDELOAD_WIPEOUT);
 }