Refactored signin/sync error controllers for the avatar button

chrome/browser/ui/avatar_button_error_controller.h

+// Copyright 2016 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_UI_AVATAR_BUTTON_ERROR_CONTROLLER_H_
+#define CHROME_BROWSER_UI_AVATAR_BUTTON_ERROR_CONTROLLER_H_
+
+#include "chrome/browser/ui/avatar_button_error_controller_delegate.h"
+#include "components/signin/core/browser/signin_error_controller.h"
+#include "components/sync_driver/sync_error_controller.h"
+
+class Profile;
+
+// Keeps track of the signin and sync errors that should be exposed to the user
+// in the avatar button.
+class AvatarButtonErrorController {
+ public:
+  AvatarButtonErrorController(AvatarButtonErrorControllerDelegate* delegate,
+                              Profile* profile);
+  ~AvatarButtonErrorController();
+
+  bool HasAvatarError() { return has_signin_error_ || has_sync_error_; }
+
+ private:
+  friend class SigninErrorObserver;
+  friend class SyncErrorObserver;
+
+  // Observes signin errors and updates the error controller for the avatar
+  // button accordingly.
+  class SigninErrorObserver : public SigninErrorController::Observer {
+   public:
+    SigninErrorObserver(
+        Profile* profile,
+        AvatarButtonErrorController* avatar_button_error_controller);
+    ~SigninErrorObserver() override;
+
+    // SigninErrorController::Observer:
+    void OnErrorChanged() override;
+
+    bool HasSigninError();
+
+   private:
+    Profile* profile_;
+    AvatarButtonErrorController* avatar_button_error_controller_;
+
+    DISALLOW_COPY_AND_ASSIGN(SigninErrorObserver);
+  };
+
+  // Observes sync errors and updates the error controller for the avatar
+  // button accordingly.
+  class SyncErrorObserver : public SyncErrorController::Observer {
+   public:
+    SyncErrorObserver(
+        Profile* profile,
+        AvatarButtonErrorController* avatar_button_error_controller);
+    ~SyncErrorObserver() override;
+
+    // SyncErrorController::Observer:
+    void OnErrorChanged() override;
+
+    bool HasSyncError();
+
+   private:
+    SyncErrorController* GetSyncErrorControllerIfNeeded();
+
+    Profile* profile_;
+    AvatarButtonErrorController* avatar_button_error_controller_;
+
+    DISALLOW_COPY_AND_ASSIGN(SyncErrorObserver);
+  };
+
+  void UpdateSigninError(bool has_signin_error);
+  void UpdateSyncError(bool has_sync_error);
+
+  AvatarButtonErrorControllerDelegate* delegate_;
+
+  SigninErrorObserver avatar_signin_error_controller_;
+  SyncErrorObserver avatar_sync_error_controller_;
+
+  bool has_signin_error_;
+  bool has_sync_error_;
+
+  DISALLOW_COPY_AND_ASSIGN(AvatarButtonErrorController);
+};
+
+#endif  // CHROME_BROWSER_UI_AVATAR_BUTTON_ERROR_CONTROLLER_H_