Simplify some old avatar menu button code.

chrome/browser/chromeos/profiles/avatar_menu_chromeos.cc

Index: chrome/browser/chromeos/profiles/avatar_menu_chromeos.cc
diff --git a/chrome/browser/chromeos/profiles/avatar_menu_chromeos.cc b/chrome/browser/chromeos/profiles/avatar_menu_chromeos.cc
index f8b69a6b5b321c8bf8c5b33d0692902475564e43..de3a55eb00d97a921b1b6b113d4c31d76b6148dc 100644
--- a/chrome/browser/chromeos/profiles/avatar_menu_chromeos.cc
+++ b/chrome/browser/chromeos/profiles/avatar_menu_chromeos.cc
@@ -15,10 +15,8 @@
 
 // static
 void AvatarMenu::GetImageForMenuButton(const base::FilePath& profile_path,
-                                       gfx::Image* image,
-                                       bool* is_rectangle) {
+                                       gfx::Image* image) {
   // ChromeOS avatar icon is circular.
-  *is_rectangle = false;
   Profile* profile =
       g_browser_process->profile_manager()->GetProfileByPath(profile_path);
   *image = gfx::Image(GetAvatarImageForContext(profile));