Revert of Convert //net and //chromecast to std::unordered_*

net/spdy/http2_write_scheduler.h

 // Copyright 2014 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 NET_SPDY_HTTP2_WRITE_SCHEDULER_H_
 #define NET_SPDY_HTTP2_WRITE_SCHEDULER_H_
 
 #include <stdint.h>
 
 #include <algorithm>
 #include <cmath>
 #include <deque>
 #include <map>
 #include <queue>
 #include <set>
 #include <unordered_map>
 #include <utility>
 #include <vector>
 
+#include "base/containers/hash_tables.h"
 #include "base/containers/linked_list.h"
 #include "base/logging.h"
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/stl_util.h"
 
 namespace net {
 
 // This data structure implements the HTTP/2 stream priority tree defined in
 // section 5.3 of RFC 7540:
@@ skipping 699 matching lines @@
   }
   // Validate the validation function; we should have visited each stream twice
   // (except for the root)
   DCHECK(streams_visited == 2 * num_streams() - 1);
   return true;
 }
 
 }  // namespace net
 
 #endif  // NET_SPDY_HTTP2_WRITE_SCHEDULER_H_