New avatar menu: Don't show "Go incognito" if incognito is disabled by policy

chrome/browser/ui/cocoa/profiles/profile_chooser_controller.mm

 // Copyright 2014 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 <Cocoa/Cocoa.h>
 
 #import "chrome/browser/ui/cocoa/profiles/profile_chooser_controller.h"
 
 #include "base/mac/bundle_locations.h"
 #include "base/prefs/pref_service.h"
 #include "base/strings/sys_string_conversions.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/lifetime/application_lifetime.h"
+#include "chrome/browser/prefs/incognito_mode_prefs.h"
 #include "chrome/browser/profiles/avatar_menu.h"
 #include "chrome/browser/profiles/avatar_menu_observer.h"
 #include "chrome/browser/profiles/profile_avatar_icon_util.h"
 #include "chrome/browser/profiles/profile_info_cache.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/browser/profiles/profile_metrics.h"
 #include "chrome/browser/profiles/profile_window.h"
 #include "chrome/browser/profiles/profiles_state.h"
 #include "chrome/browser/signin/profile_oauth2_token_service_factory.h"
 #include "chrome/browser/signin/signin_header_helper.h"
@@ skipping 742 matching lines @@
                      frameOrigin:(NSPoint)frameOrigin
                           action:(SEL)action;
 
 // Creates an email account button with |title| and a remove icon. If
 // |reauthRequired| is true, the button also displays a warning icon. |tag|
 // indicates which account the button refers to.
 - (NSButton*)accountButtonWithRect:(NSRect)rect
                              title:(const std::string&)title
                                tag:(int)tag
                     reauthRequired:(BOOL)reauthRequired;
+
+- (bool)shouldShowGoIncognito;
 @end
 
 @implementation ProfileChooserController
 - (profiles::BubbleViewMode) viewMode {
   return viewMode_;
 }
 
 - (IBAction)switchToProfile:(id)sender {
   // Check the event flags to see if a new window should be created.
   bool alwaysCreate = ui::WindowOpenDispositionFromNSEvent(
       [NSApp currentEvent]) == NEW_WINDOW;
   avatarMenu_->SwitchToProfile([sender tag], alwaysCreate,
                                ProfileMetrics::SWITCH_PROFILE_ICON);
 }
 
 - (IBAction)showUserManager:(id)sender {
   profiles::ShowUserManagerMaybeWithTutorial(browser_->profile());
 }
 
 - (IBAction)exitGuest:(id)sender {
   DCHECK(browser_->profile()->IsGuestSession());
   [self showUserManager:sender];
   profiles::CloseGuestProfileWindows();
 }
 
 - (IBAction)goIncognito:(id)sender {
-  DCHECK(!browser_->profile()->IsGuestSession());
+  DCHECK([self shouldShowGoIncognito]);
   chrome::NewIncognitoWindow(browser_);
 }
 
 - (IBAction)showAccountManagement:(id)sender {
   [self initMenuContentsWithView:profiles::BUBBLE_VIEW_MODE_ACCOUNT_MANAGEMENT];
 }
 
 - (IBAction)hideAccountManagement:(id)sender {
   [self initMenuContentsWithView:profiles::BUBBLE_VIEW_MODE_PROFILE_CHOOSER];
 }
@@ skipping 699 matching lines @@
                   imageResourceId:IDR_ICON_PROFILES_MENU_LOCK
                            action:@selector(lockProfile:)];
     [container addSubview:lockButton];
     viewRect.origin.y = NSMaxY([lockButton frame]);
 
     NSBox* separator = [self horizontalSeparatorWithFrame:viewRect];
     [container addSubview:separator];
     viewRect.origin.y = NSMaxY([separator frame]);
   }
 
-  if (!isGuestSession_) {
+  if ([self shouldShowGoIncognito]) {
     // TODO(noms): Use the correct incognito icon when it's available.
     NSButton* goIncognitoButton =
         [self hoverButtonWithRect:viewRect
                              text:l10n_util::GetNSString(
                                   IDS_PROFILES_GO_INCOGNITO_BUTTON)
                   imageResourceId:IDR_ICON_PROFILES_MENU_AVATAR
                            action:@selector(goIncognito:)];
     viewRect.origin.y = NSMaxY([goIncognitoButton frame]);
     [container addSubview:goIncognitoButton];
 
@@ skipping 396 matching lines @@
   }
 
   return button.autorelease();
 }
 
 - (void)postActionPerformed:(ProfileMetrics::ProfileDesktopMenu)action {
   ProfileMetrics::LogProfileDesktopMenu(action, serviceType_);
   serviceType_ = signin::GAIA_SERVICE_TYPE_NONE;
 }
 
+- (bool)shouldShowGoIncognito {
+  bool incognitoAvailable =
+      IncognitoModePrefs::GetAvailability(browser_->profile()->GetPrefs()) !=
+          IncognitoModePrefs::DISABLED;
+  return incognitoAvailable && !browser_->profile()->IsGuestSession();
+}
+
 @end