Disable ProfileKeyedServices on import process by default.

chrome/browser/custom_handlers/protocol_handler_registry_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/custom_handlers/protocol_handler_registry_factory.h"
 
 #include "base/memory/singleton.h"
 #include "chrome/browser/custom_handlers/protocol_handler_registry.h"
 #include "chrome/browser/extensions/extension_system_factory.h"
 #include "chrome/browser/profiles/profile.h"
@@ skipping 31 matching lines @@
   return true;
 }
 
 // Do not create this service for tests. MANY tests will fail
 // due to the threading requirements of this service. ALSO,
 // not creating this increases test isolation (which is GOOD!)
 bool ProtocolHandlerRegistryFactory::ServiceIsNULLWhileTesting() const {
   return true;
 }
 
+bool ProtocolHandlerRegistryFactory::ServiceIsNULLOnImportProcess() const {
+  return false;
+}
+
 ProfileKeyedService* ProtocolHandlerRegistryFactory::BuildServiceInstanceFor(
     Profile* profile) const {
   ProtocolHandlerRegistry* registry = new ProtocolHandlerRegistry(
       profile, new ProtocolHandlerRegistry::Delegate());
 
 #if defined(OS_CHROMEOS)
   // If installing defaults, they must be installed prior calling
   // InitProtocolSettings
   registry->InstallDefaultsForChromeOS();
 #endif
 
   // Must be called as a part of the creation process.
   registry->InitProtocolSettings();
 
   return registry;
 }