Add support for child accounts.

chrome/browser/supervised_user/child_accounts/child_account_service_factory.cc

+// Copyright 2014 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/supervised_user/child_accounts/child_account_service_factory.h"
+
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/signin/profile_oauth2_token_service_factory.h"
+#include "chrome/browser/supervised_user/child_accounts/child_account_service.h"
+#include "chrome/browser/supervised_user/supervised_user_service_factory.h"
+#include "components/keyed_service/content/browser_context_dependency_manager.h"
+
+// static
+ChildAccountService* ChildAccountServiceFactory::GetForProfile(
+    Profile* profile) {
+  return static_cast<ChildAccountService*>(
+      GetInstance()->GetServiceForBrowserContext(profile, true));
+}
+
+// static
+ChildAccountServiceFactory* ChildAccountServiceFactory::GetInstance() {
+  return Singleton<ChildAccountServiceFactory>::get();
+}
+
+ChildAccountServiceFactory::ChildAccountServiceFactory()
+    : BrowserContextKeyedServiceFactory(
+        "ChildAccountService",
+        BrowserContextDependencyManager::GetInstance()) {
+  DependsOn(SupervisedUserServiceFactory::GetInstance());
+  // Indirect dependency via AccountServiceFlagFetcher.
+  DependsOn(ProfileOAuth2TokenServiceFactory::GetInstance());
+  // TODO(treib): Do we have more dependencies here?
+}
+
+ChildAccountServiceFactory::~ChildAccountServiceFactory() {}
+
+KeyedService* ChildAccountServiceFactory::BuildServiceInstanceFor(
+    content::BrowserContext* profile) const {
+  return new ChildAccountService(static_cast<Profile*>(profile));
+}