WKWebView: Implemented recoverable SSL interstitials.

ios/web/net/crw_cert_policy_cache.mm

-// Copyright 2015 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/net/crw_cert_policy_cache.h"
-
-#include "base/location.h"
-#include "base/mac/bind_objc_block.h"
-#include "base/strings/sys_string_conversions.h"
-#include "ios/web/public/certificate_policy_cache.h"
-#include "ios/web/public/web_thread.h"
-
-@interface CRWCertPolicyCache () {
-  // Used to remember decisions about how to handle problematic certs.
-  scoped_refptr<web::CertificatePolicyCache> _impl;
-}
-@end
-
-@implementation CRWCertPolicyCache
-
-- (instancetype)init {
-  NOTREACHED();
-  return self;
-}
-
-- (instancetype)initWithCache:(scoped_refptr<web::CertificatePolicyCache>)impl {
-  DCHECK(impl);
-  self = [super init];
-  if (self) {
-    _impl = impl;
-  }
-  return self;
-}
-
-- (void)queryJudgementForCert:(scoped_refptr<net::X509Certificate>)cert
-                      forHost:(NSString*)host
-                       status:(net::CertStatus)status
-            completionHandler:(void (^)(web::CertPolicy::Judgment))handler {
-  DCHECK(handler);
-  web::WebThread::PostTask(web::WebThread::IO, FROM_HERE, base::BindBlock(^{
-    web::CertPolicy::Judgment policy =
-        _impl->QueryPolicy(cert.get(), base::SysNSStringToUTF8(host), status);
-    dispatch_async(dispatch_get_main_queue(), ^{
-      handler(policy);
-    });
-  }));
-}
-
-- (void)allowCert:(scoped_refptr<net::X509Certificate>)cert
-          forHost:(NSString*)host
-           status:(net::CertStatus)status {
-  web::WebThread::PostTask(web::WebThread::IO, FROM_HERE, base::BindBlock(^{
-    _impl->AllowCertForHost(cert.get(), base::SysNSStringToUTF8(host), status);
-  }));
-}
-
-@end