Refactored signin/sync error controllers for the avatar button

chrome/browser/ui/avatar_button_error_controller_delegate.h

Index: chrome/browser/ui/avatar_button_error_controller_delegate.h
diff --git a/chrome/browser/ui/avatar_button_error_controller_delegate.h b/chrome/browser/ui/avatar_button_error_controller_delegate.h
new file mode 100644
index 0000000000000000000000000000000000000000..8550f89d953c3cb1c907cc17e56f4fdd30cbeb73
--- /dev/null
+++ b/chrome/browser/ui/avatar_button_error_controller_delegate.h
@@ -0,0 +1,20 @@
+// 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_DELEGATE_H_
+#define CHROME_BROWSER_UI_AVATAR_BUTTON_ERROR_CONTROLLER_DELEGATE_H_
+
+// Delegate that allows AvatarButtonErrorController to communicate to
+// NewAvatarButton.
+class AvatarButtonErrorControllerDelegate {
+ public:
+  // Called when the signin/sync errors that should be exposed in the avatar
+  // button change.
+  virtual void OnAvatarErrorChanged() = 0;
+
+ protected:
+  virtual ~AvatarButtonErrorControllerDelegate() {}
+};
+
+#endif  // CHROME_BROWSER_UI_AVATAR_BUTTON_ERROR_CONTROLLER_DELEGATE_H_