Update avatar button to MD

chrome/browser/ui/views/frame/browser_frame.h

Index: chrome/browser/ui/views/frame/browser_frame.h
diff --git a/chrome/browser/ui/views/frame/browser_frame.h b/chrome/browser/ui/views/frame/browser_frame.h
index 4ea5b40394647f48d0934bcff7a7640f83427531..713bc138387a24093dc5f0a959a154b306727d63 100644
--- a/chrome/browser/ui/views/frame/browser_frame.h
+++ b/chrome/browser/ui/views/frame/browser_frame.h
@@ -34,6 +34,7 @@ class MenuModel;
 }
 
 namespace views {
+class MenuButton;
 class MenuRunner;
 class View;
 }
@@ -115,7 +116,7 @@ class BrowserFrame
                               const gfx::Point& p,
                               ui::MenuSourceType source_type) override;
 
-  views::View* GetNewAvatarMenuButton();
+  views::MenuButton* GetNewAvatarMenuButton();
 
   // Returns the menu model. BrowserFrame owns the returned model.
   // Note that in multi user mode this will upon each call create a new model.