[ios] Removed usused handleDocumentRetitledMessage:context: handler.

ios/web/web_state/ui/crw_web_controller.mm

 // Copyright 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 "ios/web/web_state/ui/crw_web_controller.h"
 
 #import <WebKit/WebKit.h>
 
 #import <objc/runtime.h>
 #include <stddef.h>
@@ skipping 2533 matching lines @@
   dispatch_once(&onceToken, ^{
     handlers = new std::map<std::string, SEL>();
     (*handlers)["addPluginPlaceholders"] =
         @selector(handleAddPluginPlaceholdersMessage:context:);
     (*handlers)["chrome.send"] = @selector(handleChromeSendMessage:context:);
     (*handlers)["console"] = @selector(handleConsoleMessage:context:);
     (*handlers)["geolocationDialog.suppressed"] =
         @selector(handleGeolocationDialogSuppressedMessage:context:);
     (*handlers)["document.favicons"] =
         @selector(handleDocumentFaviconsMessage:context:);
-    (*handlers)["document.retitled"] =
-        @selector(handleDocumentRetitledMessage:context:);
     (*handlers)["document.submit"] =
         @selector(handleDocumentSubmitMessage:context:);
     (*handlers)["externalRequest"] =
         @selector(handleExternalRequestMessage:context:);
     (*handlers)["form.activity"] =
         @selector(handleFormActivityMessage:context:);
     (*handlers)["navigator.credentials.request"] =
         @selector(handleCredentialsRequestedMessage:context:);
     (*handlers)["navigator.credentials.notifySignedIn"] =
         @selector(handleSignedInMessage:context:);
@@ skipping 3050 matching lines @@
   }
 
   return web::WEB_VIEW_DOCUMENT_TYPE_GENERIC;
 }
 
 - (NSString*)refererFromNavigationAction:(WKNavigationAction*)action {
   return [action.request valueForHTTPHeaderField:@"Referer"];
 }
 
 @end