Disable ProfileKeyedServices on import process by default.

chrome/browser/profiles/profile_keyed_base_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/profiles/profile_keyed_base_factory.h"
 
+#include "base/command_line.h"
 #include "base/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/profiles/profile_dependency_manager.h"
+#include "chrome/browser/profiles/profile_manager.h"
 #include "components/user_prefs/pref_registry_syncable.h"
 
 ProfileKeyedBaseFactory::ProfileKeyedBaseFactory(
     const char* name, ProfileDependencyManager* manager)
     : dependency_manager_(manager)
 #ifndef NDEBUG
     , service_name_(name)
 #endif
 {
   dependency_manager_->AddComponent(this);
@@ skipping 22 matching lines @@
 #ifndef NDEBUG
       dependency_manager_->AssertProfileWasntDestroyed(profile);
 #endif
     } else if (ServiceHasOwnInstanceInIncognito()) {
       // No-op; the pointers are already set correctly.
     } else {
       return NULL;
     }
   }
 
+  // If this is the import process, most services are not created to avoid
+  // conflicts with non-shareable resources used by the same service running in
+  // the browser process.
+  if (ProfileManager::IsImportProcess(*CommandLine::ForCurrentProcess()) &&
+      ServiceIsNULLOnImportProcess()) {
+    return NULL;
+  }
+
   return profile;
 }
 
 void ProfileKeyedBaseFactory::RegisterUserPrefsOnProfile(Profile* profile) {
   // Safe timing for pref registration is hard. Previously, we made Profile
   // responsible for all pref registration on every service that used
   // Profile. Now we don't and there are timing issues.
   //
   // With normal profiles, prefs can simply be registered at
   // ProfileDependencyManager::CreateProfileServices time. With incognito
@@ skipping 33 matching lines @@
 }
 
 bool ProfileKeyedBaseFactory::ServiceIsCreatedWithProfile() const {
   return false;
 }
 
 bool ProfileKeyedBaseFactory::ServiceIsNULLWhileTesting() const {
   return false;
 }
 
+bool ProfileKeyedBaseFactory::ServiceIsNULLOnImportProcess() const {
+  return true;
+}
+
 void ProfileKeyedBaseFactory::ProfileDestroyed(Profile* profile) {
   // While object destruction can be customized in ways where the object is
   // only dereferenced, this still must run on the UI thread.
   DCHECK(CalledOnValidThread());
 
   registered_preferences_.erase(profile);
 }
 
 bool ProfileKeyedBaseFactory::ArePreferencesSetOn(Profile* profile) const {
   return registered_preferences_.find(profile) !=
       registered_preferences_.end();
 }
 
 void ProfileKeyedBaseFactory::MarkPreferencesSetOn(Profile* profile) {
   DCHECK(!ArePreferencesSetOn(profile));
   registered_preferences_.insert(profile);
 }