Disable ProfileKeyedServices on import process by default.

chrome/browser/extensions/extension_system_factory.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_system_factory.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"
@@ skipping 32 matching lines @@
 
 ProfileKeyedService* ExtensionSystemSharedFactory::BuildServiceInstanceFor(
     Profile* profile) const {
   return new ExtensionSystemImpl::Shared(profile);
 }
 
 bool ExtensionSystemSharedFactory::ServiceRedirectedInIncognito() const {
   return true;
 }
 
+bool ExtensionSystemSharedFactory::ServiceIsNULLOnImportProcess() const {
+  return false;
+}
+
 // ExtensionSystemFactory
 
 // static
 ExtensionSystem* ExtensionSystemFactory::GetForProfile(Profile* profile) {
   return static_cast<ExtensionSystem*>(
       GetInstance()->GetServiceForProfile(profile, true));
 }
 
 // static
 ExtensionSystemFactory* ExtensionSystemFactory::GetInstance() {
@@ skipping 12 matching lines @@
 
 ProfileKeyedService* ExtensionSystemFactory::BuildServiceInstanceFor(
     Profile* profile) const {
   return new ExtensionSystemImpl(profile);
 }
 
 bool ExtensionSystemFactory::ServiceHasOwnInstanceInIncognito() const {
   return true;
 }
 
+bool ExtensionSystemFactory::ServiceIsNULLOnImportProcess() const {
+  return false;

[Elliot Glaysher, 2013/03/07 20:45:48]

The extension system depends on a lot of stuff, and IIUC, this will implicitly
create those services.

+}
+
 bool ExtensionSystemFactory::ServiceIsCreatedWithProfile() const {
   return true;
 }
 
 }  // namespace extensions