Take extensions out of Profile into a profile-keyed service, ExtensionSystem.

chrome/browser/extensions/extension_system_factory.cc

Index: chrome/browser/extensions/extension_system_factory.cc
diff --git a/chrome/browser/extensions/extension_system_factory.cc b/chrome/browser/extensions/extension_system_factory.cc
new file mode 100644
index 0000000000000000000000000000000000000000..956e7356539c7b87a2681f308ee0fbb8a7c49c07
--- /dev/null
+++ b/chrome/browser/extensions/extension_system_factory.cc
@@ -0,0 +1,87 @@
+// 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_system_factory.h"
+
+#include "chrome/browser/extensions/extension_message_service.h"
+#include "chrome/browser/extensions/extension_prefs.h"
+#include "chrome/browser/extensions/extension_service.h"
+#include "chrome/browser/extensions/extension_system.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/profiles/profile_dependency_manager.h"
+#include "chrome/browser/search_engines/template_url_service_factory.h"
+#include "chrome/browser/themes/theme_service_factory.h"
+#include "chrome/browser/ui/global_error_service_factory.h"
+
+// ExtensionSystemSharedFactory
+
+// static
+ExtensionSystemImpl::Shared* ExtensionSystemSharedFactory::GetForProfile(
+    Profile* profile) {
+  return static_cast<ExtensionSystemImpl::Shared*>(
+      GetInstance()->GetServiceForProfile(profile, true));
+}
+
+// static
+ExtensionSystemSharedFactory* ExtensionSystemSharedFactory::GetInstance() {
+  return Singleton<ExtensionSystemSharedFactory>::get();
+}
+
+ExtensionSystemSharedFactory::ExtensionSystemSharedFactory()
+    : ProfileKeyedServiceFactory(
+        "ExtensionSystemShared",
+        ProfileDependencyManager::GetInstance()) {
+  DependsOn(GlobalErrorServiceFactory::GetInstance());
+  DependsOn(TemplateURLServiceFactory::GetInstance());
+  DependsOn(ThemeServiceFactory::GetInstance());
+}
+
+ExtensionSystemSharedFactory::~ExtensionSystemSharedFactory() {
+}
+
+ProfileKeyedService* ExtensionSystemSharedFactory::BuildServiceInstanceFor(
+    Profile* profile) const {
+  return new ExtensionSystemImpl::Shared(profile);
+}
+
+bool ExtensionSystemSharedFactory::ServiceRedirectedInIncognito() {
+  return true;
+}
+
+// ExtensionSystemFactory
+
+// static
+ExtensionSystem* ExtensionSystemFactory::GetForProfile(
+    Profile* profile) {
+  return static_cast<ExtensionSystem*>(
+      GetInstance()->GetServiceForProfile(profile, true));
+}
+
+// static
+ExtensionSystemFactory* ExtensionSystemFactory::GetInstance() {
+  return Singleton<ExtensionSystemFactory>::get();
+}
+
+ExtensionSystemFactory::ExtensionSystemFactory()
+    : ProfileKeyedServiceFactory(
+        "ExtensionSystem",
+        ProfileDependencyManager::GetInstance()) {
+  DependsOn(ExtensionSystemSharedFactory::GetInstance());
+}
+
+ExtensionSystemFactory::~ExtensionSystemFactory() {
+}
+
+ProfileKeyedService* ExtensionSystemFactory::BuildServiceInstanceFor(
+    Profile* profile) const {
+  return new ExtensionSystemImpl(profile);
+}
+
+bool ExtensionSystemFactory::ServiceHasOwnInstanceInIncognito() {
+  return true;
+}
+
+bool ExtensionSystemFactory::ServiceIsCreatedWithProfile() {
+  return true;
+}