Refactor the avatar button/icon class

chrome/browser/ui/views/profiles/avatar_menu_button.h

Index: chrome/browser/ui/views/profiles/avatar_menu_button.h
diff --git a/chrome/browser/ui/views/profiles/avatar_menu_button.h b/chrome/browser/ui/views/profiles/avatar_menu_button.h
index 343e4670fda9704f7f6058763a114ec1241d9233..da6e6e2c36f5634adc1ff91c09debdd7199fc6fe 100644
--- a/chrome/browser/ui/views/profiles/avatar_menu_button.h
+++ b/chrome/browser/ui/views/profiles/avatar_menu_button.h
@@ -8,6 +8,7 @@
 #include <string>
 
 #include "base/compiler_specific.h"
+#include "chrome/browser/ui/views/profiles/avatar_base_controller.h"
 #include "ui/base/models/simple_menu_model.h"
 #include "ui/views/controls/button/menu_button.h"
 #include "ui/views/controls/button/menu_button_listener.h"
@@ -25,7 +26,8 @@ class Profile;
 // A button used to show either the incognito avatar or the profile avatar.
 // The button can optionally have a menu attached to it.
 
-class AvatarMenuButton : public views::MenuButton,
+class AvatarMenuButton : public AvatarBaseController,
+                         public views::MenuButton,
                          public views::MenuButtonListener,
                          public views::ViewTargeterDelegate {
  public:
@@ -63,6 +65,9 @@ class AvatarMenuButton : public views::MenuButton,
                               bool* is_rectangle);
 
  private:
+  // AvatarBaseController:
+  void Update() override;
+
   // views::ViewTargeterDelegate:
   bool DoesIntersectRect(const views::View* target,
                          const gfx::Rect& rect) const override;
@@ -71,7 +76,6 @@ class AvatarMenuButton : public views::MenuButton,
   void OnMenuButtonClicked(views::View* source,
                            const gfx::Point& point) override;
 
-  Browser* browser_;
   bool disabled_;
   scoped_ptr<ui::MenuModel> menu_model_;