Add support for child accounts.

chrome/browser/supervised_user/child_accounts/child_account_service.h

Index: chrome/browser/supervised_user/child_accounts/child_account_service.h
diff --git a/chrome/browser/supervised_user/child_accounts/child_account_service.h b/chrome/browser/supervised_user/child_accounts/child_account_service.h
new file mode 100644
index 0000000000000000000000000000000000000000..bdd04f8a573ede2fcf8c7ca2df74927a1d8e1575
--- /dev/null
+++ b/chrome/browser/supervised_user/child_accounts/child_account_service.h
@@ -0,0 +1,93 @@
+// 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.
+
+#ifndef CHROME_BROWSER_SUPERVISED_USER_CHILD_ACCOUNTS_CHILD_ACCOUNT_SERVICE_H_
+#define CHROME_BROWSER_SUPERVISED_USER_CHILD_ACCOUNTS_CHILD_ACCOUNT_SERVICE_H_
+
+#include <string>
+#include <vector>
+
+#include "base/macros.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/memory/weak_ptr.h"
+#include "chrome/browser/supervised_user/child_accounts/family_info_fetcher.h"
+#include "chrome/browser/supervised_user/supervised_user_service.h"
+#include "components/keyed_service/core/keyed_service.h"
+#include "components/signin/core/browser/account_service_flag_fetcher.h"
+#include "components/signin/core/browser/signin_manager_base.h"
+
+namespace base {
+class FilePath;
+}
+
+class Profile;
+
+// This class handles detection of child accounts (on sign-in as well as on
+// browser restart), and triggers the appropriate behavior (e.g. enable the
+// supervised user experience, fetch information about the parent(s)).
+class ChildAccountService : public KeyedService,
+                            public FamilyInfoFetcher::Consumer,
+                            public SigninManagerBase::Observer,
+                            public SupervisedUserService::Delegate {
+ public:
+  virtual ~ChildAccountService();
+
+  void Init();
+
+  // KeyedService:
+  virtual void Shutdown() override;
+
+ private:
+  friend class ChildAccountServiceFactory;
+  // Use |ChildAccountServiceFactory::GetForProfile(...)| to get an instance of
+  // this service.
+  explicit ChildAccountService(Profile* profile);
+
+  // SupervisedUserService::Delegate implementation.
+  virtual bool SetActive(bool active) override;
+  virtual bool IsChildAccount() const override;
+  virtual base::FilePath GetBlacklistPath() const override;
+  virtual GURL GetBlacklistURL() const override;
+  virtual std::string GetSafeSitesCx() const override;
+
+  // SigninManagerBase::Observer implementation.
+  virtual void GoogleSigninSucceeded(const std::string& account_id,
+                                     const std::string& username,
+                                     const std::string& password) override;
+  virtual void GoogleSignedOut(const std::string& account_id,
+                               const std::string& username) override;
+
+  // FamilyInfoFetcher::Consumer implementation.
+  virtual void OnGetFamilyMembersSuccess(
+      const std::vector<FamilyInfoFetcher::FamilyMember>& members) override;
+  virtual void OnFailure(FamilyInfoFetcher::ErrorCode error) override;
+
+  void StartFetchingServiceFlags(const std::string& account_id);
+  void CancelFetchingServiceFlags();
+  void OnFlagsFetched(AccountServiceFlagFetcher::ResultCode,
+                      const std::vector<std::string>& flags);
+
+  void SetIsChildAccount(bool is_child_account);
+
+  void PropagateChildStatusToUser(bool is_child);
+
+  // Owns us via the KeyedService mechanism.
+  Profile* profile_;
+
+  bool active_;
+
+  // The user for which we are currently trying to fetch the child account flag.
+  // Empty when we are not currently fetching.
+  std::string account_id_;
+
+  scoped_ptr<AccountServiceFlagFetcher> flag_fetcher_;
+
+  scoped_ptr<FamilyInfoFetcher> family_fetcher_;
+
+  base::WeakPtrFactory<ChildAccountService> weak_ptr_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(ChildAccountService);
+};
+
+#endif  // CHROME_BROWSER_SUPERVISED_USER_CHILD_ACCOUNTS_CHILD_ACCOUNT_SERVICE_H_