Update app list search box menu when Users changes

ui/app_list/cocoa/app_list_view_controller.mm

Index: ui/app_list/cocoa/app_list_view_controller.mm
diff --git a/ui/app_list/cocoa/app_list_view_controller.mm b/ui/app_list/cocoa/app_list_view_controller.mm
index 51a71cfa942fbc1647e5091d34fdc1e9c0cd941e..2379a8bfec35c70093d78598e7c5d8317dd153e1 100644
--- a/ui/app_list/cocoa/app_list_view_controller.mm
+++ b/ui/app_list/cocoa/app_list_view_controller.mm
@@ -81,7 +81,8 @@ const NSTimeInterval kResultsAnimationDuration = 0.2;
 
 namespace app_list {
 
-class AppListModelObserverBridge : public AppListModelObserver {
+class AppListModelObserverBridge : public AppListModelObserver,
+                                   public AppListViewDelegateObserver {
  public:
   AppListModelObserverBridge(AppListViewController* parent);
   virtual ~AppListModelObserverBridge();
@@ -90,6 +91,9 @@ class AppListModelObserverBridge : public AppListModelObserver {
   // Overridden from app_list::AppListModelObserver:
   virtual void OnAppListModelSigninStatusChanged() OVERRIDE;
 
+  // Overridden from app_list::AppListViewDelegateObserver:
+  virtual void OnUsersChanged() OVERRIDE;
+
   AppListViewController* parent_;  // Weak. Owns us.
 
   DISALLOW_COPY_AND_ASSIGN(AppListModelObserverBridge);
@@ -99,16 +103,22 @@ AppListModelObserverBridge::AppListModelObserverBridge(
     AppListViewController* parent)
     : parent_(parent) {
   [[parent_ appsGridController] model]->AddObserver(this);
+  [parent_ delegate]->AddObserver(this);
 }
 
 AppListModelObserverBridge::~AppListModelObserverBridge() {
   [[parent_ appsGridController] model]->RemoveObserver(this);
+  [parent_ delegate]->RemoveObserver(this);
 }
 
 void AppListModelObserverBridge::OnAppListModelSigninStatusChanged() {
   [parent_ onSigninStatusChanged];
 }
 
+void AppListModelObserverBridge::OnUsersChanged() {
+  [[parent_ appsSearchBoxController] rebuildMenu];
+}
+
 }  // namespace app_list
 
 @implementation AppListViewController
@@ -169,6 +179,10 @@ void AppListModelObserverBridge::OnAppListModelSigninStatusChanged() {
   [self onSigninStatusChanged];
 }
 
+- (AppsSearchBoxController*)appsSearchBoxController {
+  return appsSearchBoxController_;
+}
+
 -(void)loadAndSetView {
   pagerControl_.reset([[AppListPagerView alloc] init]);
   [pagerControl_ setTarget:appsGridController_];