Move AppListModel::Users to AppListViewDelegate

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 70 matching lines @@
 
 namespace app_list {
 
 class AppListModelObserverBridge : public AppListModelObserver {
  public:
   AppListModelObserverBridge(AppListViewController* parent);
   virtual ~AppListModelObserverBridge();
 
  private:
   // Overridden from app_list::AppListModelObserver:
-  virtual void OnAppListModelUsersChanged() OVERRIDE;
   virtual void OnAppListModelSigninStatusChanged() OVERRIDE;
 
   AppListViewController* parent_;  // Weak. Owns us.
 
   DISALLOW_COPY_AND_ASSIGN(AppListModelObserverBridge);
 };
 
 AppListModelObserverBridge::AppListModelObserverBridge(
     AppListViewController* parent)
     : parent_(parent) {
   [[parent_ appsGridController] model]->AddObserver(this);
 }
 
 AppListModelObserverBridge::~AppListModelObserverBridge() {
   [[parent_ appsGridController] model]->RemoveObserver(this);
 }
 
-void AppListModelObserverBridge::OnAppListModelUsersChanged() {
-  [parent_ onSigninStatusChanged];
-}
-
 void AppListModelObserverBridge::OnAppListModelSigninStatusChanged() {
   [parent_ onSigninStatusChanged];
 }
 
 }  // namespace app_list
 
 @implementation AppListViewController
 
 - (id)init {
   if ((self = [super init])) {
@@ skipping 227 matching lines @@
 
   [backgroundView_ setHidden:YES];
   signinViewController_.reset(
       [[SigninViewController alloc] initWithFrame:[backgroundView_ frame]
                                      cornerRadius:kBubbleCornerRadius
                                          delegate:signinDelegate]);
   [[self view] addSubview:[signinViewController_ view]];
 }
 
 @end