Add DCHECKs to StatefulExternalExtensionProvider

chrome/browser/extensions/extension_service.cc

 // 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.
 
 #include "chrome/browser/extensions/extension_service.h"
 
 #include <algorithm>
 
 #include "base/basictypes.h"
 #include "base/command_line.h"
@@ skipping 284 matching lines @@
           new ExternalPrefExtensionProvider()));
 #if defined(OS_WIN)
   external_extension_providers_.push_back(
       linked_ptr<ExternalExtensionProvider>(
           new ExternalRegistryExtensionProvider()));
 #endif
   // The policy-controlled extension provider is also stored in a member
   // variable so that UpdateExternalPolicyExtensionProvider can access it and
   // update its extension list later.
   external_policy_extension_provider_.reset(
-      new ExternalPolicyExtensionProvider());
-  external_policy_extension_provider_->SetPreferences(
-      prefs->GetList(prefs::kExtensionInstallForceList));
+      new ExternalPolicyExtensionProvider(
+          prefs->GetList(prefs::kExtensionInstallForceList)));
   external_extension_providers_.push_back(external_policy_extension_provider_);
 }
 
 ExtensionServiceBackend::~ExtensionServiceBackend() {
 }
 
 void ExtensionServiceBackend::LoadSingleExtension(
     const FilePath& path_in, scoped_refptr<ExtensionService> frontend) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
 
@@ skipping 1788 matching lines @@
 }
 
 void ExtensionService::SetBeingUpgraded(const Extension* extension,
                                          bool value) {
   extension_runtime_data_[extension->id()].being_upgraded = value;
 }
 
 PropertyBag* ExtensionService::GetPropertyBag(const Extension* extension) {
   return &extension_runtime_data_[extension->id()].property_bag;
 }