Add a button to exit managed mode.

chrome/browser/ui/cocoa/browser_window_controller.mm

Index: chrome/browser/ui/cocoa/browser_window_controller.mm
diff --git a/chrome/browser/ui/cocoa/browser_window_controller.mm b/chrome/browser/ui/cocoa/browser_window_controller.mm
index ec6fd54e6135e2637e58c7f72f51cdf95bfa0d0e..5bf62141bf801bbbdea2a5376f99292bc2186ea0 100644
--- a/chrome/browser/ui/cocoa/browser_window_controller.mm
+++ b/chrome/browser/ui/cocoa/browser_window_controller.mm
@@ -16,6 +16,7 @@
 #include "chrome/browser/bookmarks/bookmark_editor.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/instant/instant_controller.h"
+#include "chrome/browser/managed_mode.h"
 #include "chrome/browser/profiles/avatar_menu_model.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/profiles/profile_info_cache.h"
@@ -1404,8 +1405,10 @@ enum {
 - (BOOL)shouldShowAvatar {
   if (![self hasTabStrip])
     return NO;
-  if (browser_->profile()->IsOffTheRecord())
+  if (browser_->profile()->IsOffTheRecord() ||
+      ManagedMode::IsInManagedMode()) {
     return YES;
+  }
 
   ProfileInfoCache& cache =
       g_browser_process->profile_manager()->GetProfileInfoCache();