[ios] Reduce access to private //ios/web API.

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 2908 matching lines @@
 
 - (void)wasShown {
   if ([self.nativeController respondsToSelector:@selector(wasShown)]) {
     [self.nativeController wasShown];
   }
 }
 
 - (void)wasHidden {
   if (_isHalted)
     return;
+  [self recordStateInHistory];
   if ([self.nativeController respondsToSelector:@selector(wasHidden)]) {
     [self.nativeController wasHidden];
   }
 }
 
 + (BOOL)webControllerCanShow:(const GURL&)url {
   return web::UrlHasWebScheme(url) ||
          web::GetWebClient()->IsAppSpecificURL(url) ||
          url.SchemeIs(url::kFileScheme) || url.SchemeIs(url::kAboutScheme);
 }
@@ skipping 2220 matching lines @@
 - (void)simulateLoadRequestWithURL:(const GURL&)URL {
   _lastRegisteredRequestURL = URL;
   _loadPhase = web::LOAD_REQUESTED;
 }
 
 - (NSString*)referrerFromNavigationAction:(WKNavigationAction*)action {
   return [action.request valueForHTTPHeaderField:kReferrerHeaderName];
 }
 
 @end