Mac: Fix SDK 10.11 Compile errors after clang roll in r387792

chrome/browser/ui/cocoa/history_menu_cocoa_controller.mm

 // Copyright (c) 2012 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 "chrome/browser/ui/cocoa/history_menu_cocoa_controller.h"
 
+#import "base/mac/foundation_util.h"
 #include "chrome/app/chrome_command_ids.h"  // IDC_HISTORY_MENU
 #import "chrome/browser/app_controller_mac.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/sessions/tab_restore_service_factory.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_finder.h"
 #include "chrome/browser/ui/browser_live_tab_context.h"
 #include "chrome/browser/ui/browser_navigator.h"
 #include "chrome/browser/ui/browser_navigator_params.h"
 #include "components/history/core/browser/history_service.h"
 #include "components/history/core/browser/history_types.h"
 #include "components/sessions/core/tab_restore_service.h"
 #import "ui/base/cocoa/cocoa_base_utils.h"
 #include "ui/base/window_open_disposition.h"
 
 using content::OpenURLParams;
 using content::Referrer;
 
 @implementation HistoryMenuCocoaController
 
 - (id)initWithBridge:(HistoryMenuBridge*)bridge {
   if ((self = [super init])) {
     bridge_ = bridge;
     DCHECK(bridge_);
   }
   return self;
 }
 
 - (BOOL)validateMenuItem:(NSMenuItem*)menuItem {
-  AppController* controller = [NSApp delegate];
+  AppController* controller =
+      base::mac::ObjCCastStrict<AppController>([NSApp delegate]);
   return ![controller keyWindowIsModal];
 }
 
 // Open the URL of the given history item in the current tab.
 - (void)openURLForItem:(const HistoryMenuBridge::HistoryItem*)node {
   // If this item can be restored using TabRestoreService, do so. Otherwise,
   // just load the URL.
   sessions::TabRestoreService* service =
       TabRestoreServiceFactory::GetForProfile(bridge_->profile());
   if (node->session_id && service) {
@@ skipping 12 matching lines @@
   }
 }
 
 - (IBAction)openHistoryMenuItem:(id)sender {
   const HistoryMenuBridge::HistoryItem* item =
       bridge_->HistoryItemForMenuItem(sender);
   [self openURLForItem:item];
 }
 
 @end  // HistoryMenuCocoaController