Add support for time based deletion of browsing data on iOS

ios/net/http_cache_helper.h

 // 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.
 
 #ifndef IOS_NET_HTTP_CACHE_HELPER_H_
 #define IOS_NET_HTTP_CACHE_HELPER_H_
 
 #include "base/callback_forward.h"
 #include "base/memory/ref_counted.h"
 #include "net/base/completion_callback.h"
 
 namespace base {
 class TaskRunner;
 }
 
 namespace net {
 class URLRequestContextGetter;
 
 // Clears the HTTP cache and calls |closure| back.
 void ClearHttpCache(const scoped_refptr<net::URLRequestContextGetter>& getter,
                     const scoped_refptr<base::TaskRunner>& network_task_runner,
+                    const base::Time& delete_begin,
+                    const base::Time& delete_end,
                     const net::CompletionCallback& callback);
 
 }  // namespace net
 
 #endif  // IOS_NET_HTTP_CACHE_HELPER_H_