Ensure that --disable-extensions disables extension prefs from being enacted

chrome/browser/ui/cocoa/extensions/extension_popup_controller_unittest.mm

 // Copyright (c) 2011 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 "base/memory/scoped_nsobject.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop.h"
 #include "chrome/browser/extensions/extension_pref_value_map.h"
 #include "chrome/browser/extensions/extension_prefs.h"
 #include "chrome/browser/extensions/extension_process_manager.h"
@@ skipping 19 matching lines @@
 
   void InitExtensionProfile() {
     DCHECK(!GetExtensionProcessManager());
     DCHECK(!GetExtensionService());
 
     manager_.reset(ExtensionProcessManager::Create(this));
     extension_pref_value_map_.reset(new ExtensionPrefValueMap);
     extension_prefs_.reset(new ExtensionPrefs(GetPrefs(),
                                               GetExtensionsInstallDir(),
                                               extension_pref_value_map_.get()));
+    extension_prefs_->Init(false);
     service_.reset(new ExtensionService(this,
                                         CommandLine::ForCurrentProcess(),
                                         GetExtensionsInstallDir(),
                                         extension_prefs_.get(),
                                         false,
                                         true));
     service_->set_extensions_enabled(true);
     service_->set_show_extensions_prompts(false);
     service_->ClearProvidersForTesting();
     service_->Init();
@@ skipping 47 matching lines @@
 };
 
 TEST_F(ExtensionPopupControllerTest, DISABLED_Basics) {
   // TODO(andybons): Better mechanisms for mocking out the extensions service
   // and extensions for easy testing need to be implemented.
   // http://crbug.com/28316
   EXPECT_TRUE([ExtensionPopupController popup]);
 }
 
 }  // namespace