Add managed user avatar menu for mac.

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 757dc5f941b6b9a1676f2f6b1138da79519693d5..8cb247cad9d13a49584a025bdec3c0f2d4eb1767 100644
--- a/chrome/browser/ui/cocoa/browser_window_controller.mm
+++ b/chrome/browser/ui/cocoa/browser_window_controller.mm
@@ -1621,6 +1621,8 @@ enum {
   // TODO(dmaclach): Instead of redrawing the whole window, views that care
   // about the active window state should be registering for notifications.
   [[self window] setViewsNeedDisplay:YES];
+  if (avatarButtonController_.get())
+    [avatarButtonController_ updateColors:[self themeProvider]];
 }
 
 - (ui::ThemeProvider*)themeProvider {
@@ -1722,6 +1724,9 @@ enum {
   // image to display based on the browser.
   avatarButtonController_.reset(
       [[AvatarButtonController alloc] initWithBrowser:browser_.get()]);
+  if ([avatarButtonController_ labelView])
+    [avatarButtonController_ updateColors:[self themeProvider]];
+
   NSView* view = [avatarButtonController_ view];
   [view setAutoresizingMask:NSViewMinXMargin | NSViewMinYMargin];
   [view setHidden:![self shouldShowAvatar]];