Mac: Use cross-platform menu model for profile button.

chrome/browser/ui/cocoa/profile_menu_button.mm

Index: chrome/browser/ui/cocoa/profile_menu_button.mm
diff --git a/chrome/browser/ui/cocoa/profile_menu_button.mm b/chrome/browser/ui/cocoa/profile_menu_button.mm
index 866bb40ffd0275df35930abc823874ea9c2e9701..aeb1bd9f556e724305b5a8342ab34ebfe2b2949b 100644
--- a/chrome/browser/ui/cocoa/profile_menu_button.mm
+++ b/chrome/browser/ui/cocoa/profile_menu_button.mm
@@ -7,6 +7,7 @@
 #include <algorithm>
 
 #include "base/logging.h"
+#include "chrome/browser/ui/profile_menu_model.h"
 #import "third_party/GTM/AppKit/GTMFadeTruncatingTextFieldCell.h"
 
 namespace {
@@ -52,6 +53,10 @@ NSColor* GetBlackWithAlpha(CGFloat alpha) {
   [textFieldCell_ setAlignment:NSRightTextAlignment];
   [textFieldCell_ setFont:[NSFont systemFontOfSize:
       [NSFont smallSystemFontSize]]];
+
+  profile_menu_model_.reset(new ProfileMenuModel);
+  menu_.reset([[MenuController alloc] initWithModel:profile_menu_model_.get()
+                             useWithPopUpButtonCell:NO]);
 }
 
 - (id)initWithFrame:(NSRect)frame
@@ -326,6 +331,10 @@ NSColor* GetBlackWithAlpha(CGFloat alpha) {
   }
 }
 
+- (NSMenu *)menu {
+  return [menu_.get() menu];
+}
+
 - (NSPoint)popUpMenuPosition {
   NSPoint menuPos = [self tabRect].origin;
   // By default popUpContextMenu: causes the menu to show up a few pixels above