Extract InstallVerifier from ExtensionSystem.

chrome/browser/extensions/test_extension_system.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/test_extension_system.h"
 
 #include "base/command_line.h"
 #include "base/prefs/pref_service.h"
 #include "chrome/browser/extensions/blacklist.h"
 #include "chrome/browser/extensions/extension_management.h"
@@ skipping 137 matching lines @@
 TestExtensionSystem::lazy_background_task_queue() {
   return lazy_background_task_queue_.get();
 }
 
 void TestExtensionSystem::SetEventRouter(scoped_ptr<EventRouter> event_router) {
   event_router_.reset(event_router.release());
 }
 
 EventRouter* TestExtensionSystem::event_router() { return event_router_.get(); }
 
-InstallVerifier* TestExtensionSystem::install_verifier() {
-  return install_verifier_.get();
-}
-
 QuotaService* TestExtensionSystem::quota_service() {
   return quota_service_.get();
 }
 
 const OneShotEvent& TestExtensionSystem::ready() const {
   return ready_;
 }
 
 ContentVerifier* TestExtensionSystem::content_verifier() {
   return NULL;
 }
 
 scoped_ptr<ExtensionSet> TestExtensionSystem::GetDependentExtensions(
     const Extension* extension) {
   return extension_service()->shared_module_service()->GetDependentExtensions(
       extension);
 }
 
 // static
 KeyedService* TestExtensionSystem::Build(content::BrowserContext* profile) {
   return new TestExtensionSystem(static_cast<Profile*>(profile));
 }
 
 }  // namespace extensions