Refactored signin/sync error controllers for the avatar button

chrome/browser/signin/avatar_signin_error_controller.cc

+// Copyright (c) 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.
+
+#include "chrome/browser/signin/avatar_signin_error_controller.h"
+
+#include "chrome/browser/profiles/profiles_state.h"
+#include "components/signin/core/browser/signin_error_controller.h"
+
+AvatarSigninErrorController::AvatarSigninErrorController(Profile* profile)
+    : profile_(profile), has_error_(false) {
+  SigninErrorController* signin_error_controller =
+      profiles::GetSigninErrorController(profile_);
+  if (signin_error_controller)
+    signin_error_controller->AddObserver(this);
+}
+
+AvatarSigninErrorController::~AvatarSigninErrorController() {
+  SigninErrorController* signin_error_controller =
+      profiles::GetSigninErrorController(profile_);
+  if (signin_error_controller)
+    signin_error_controller->RemoveObserver(this);
+}
+
+void AvatarSigninErrorController::OnErrorChanged() {
+  const SigninErrorController* signin_error_controller =
+      profiles::GetSigninErrorController(profile_);
+  has_error_ = signin_error_controller && signin_error_controller->HasError();
+}