Update app list search box menu when Users changes

ui/app_list/cocoa/app_list_view_controller.mm

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import "ui/app_list/cocoa/app_list_view_controller.h"
 
 #include "base/mac/foundation_util.h"
 #include "base/strings/string_util.h"
 #include "base/strings/sys_string_conversions.h"
 #include "skia/ext/skia_utils_mac.h"
@@ skipping 63 matching lines @@
 
 @interface AppListViewController ()
 
 - (void)loadAndSetView;
 - (void)revealSearchResults:(BOOL)show;
 
 @end
 
 namespace app_list {
 
-class AppListModelObserverBridge : public AppListModelObserver {
+class AppListModelObserverBridge : public AppListModelObserver,
+                                   public AppListViewDelegateObserver {
  public:
   AppListModelObserverBridge(AppListViewController* parent);
   virtual ~AppListModelObserverBridge();
 
  private:
   // 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);
 };
 
 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
 
 - (id)init {
   if ((self = [super init])) {
     appsGridController_.reset([[AppsGridController alloc] init]);
     [self loadAndSetView];
 
     [self totalPagesChanged];
@@ skipping 40 matching lines @@
   if (!delegate_)
     return;
   [appsGridController_ setDelegate:delegate_.get()];
   [appsSearchBoxController_ setDelegate:self];
   [appsSearchResultsController_ setDelegate:self];
   app_list_model_observer_bridge_.reset(
       new app_list::AppListModelObserverBridge(self));
   [self onSigninStatusChanged];
 }
 
+- (AppsSearchBoxController*)appsSearchBoxController {
+  return appsSearchBoxController_;
+}
+
 -(void)loadAndSetView {
   pagerControl_.reset([[AppListPagerView alloc] init]);
   [pagerControl_ setTarget:appsGridController_];
   [pagerControl_ setAction:@selector(onPagerClicked:)];
 
   NSRect gridFrame = [[appsGridController_ view] frame];
   NSRect contentsRect = NSMakeRect(0, kSearchInputHeight + kTopSeparatorSize,
       NSWidth(gridFrame), NSHeight(gridFrame) + kPagerPreferredHeight -
           [AppsGridController scrollerPadding]);
 
@@ skipping 158 matching lines @@
 
   [backgroundView_ setHidden:YES];
   signinViewController_.reset(
       [[SigninViewController alloc] initWithFrame:[backgroundView_ frame]
                                      cornerRadius:kBubbleCornerRadius
                                          delegate:signinDelegate]);
   [[self view] addSubview:[signinViewController_ view]];
 }
 
 @end