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..8224185954d9716e08c2a7cbda62af35e80e9f71 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_button.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 AvatarBaseButton,
+                         public views::MenuButton,
                          public views::MenuButtonListener,
                          public views::ViewTargeterDelegate {
  public:
@@ -61,6 +63,9 @@ class AvatarMenuButton : public views::MenuButton,
                               gfx::Image* avatar,
                               gfx::Image* taskbar_badge_avatar,
                               bool* is_rectangle);
+ protected:
+  // AvatarBaseButton:
+  void Update() override;
 
  private:
   // views::ViewTargeterDelegate:
@@ -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_;