Split net/spdy into core and chromium subdirectories.

net/spdy/core/lifo_write_scheduler.h

 // Copyright (c) 2017 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_LIFO_WRITE_SCHEDULER_H_
 #define NET_SPDY_LIFO_WRITE_SCHEDULER_H_
 
 #include <map>
 #include <set>
 #include <tuple>
 #include <vector>
 
+#include "net/spdy/core/write_scheduler.h"
 #include "net/spdy/platform/api/spdy_string_utils.h"
-#include "net/spdy/write_scheduler.h"
 
 namespace net {
 
 namespace test {
 
 template <typename StreamIdType>
 class LifoWriteSchedulerPeer;
 
 }  // namespace test
 
@@ skipping 149 matching lines @@
   if (it == ready_streams_.end()) {
     SPDY_BUG << "Try to remove a stream that is not on list";
     return;
   }
   ready_streams_.erase(it);
 }
 
 }  // namespace net
 
 #endif  // NET_SPDY_LIFO_WRITE_SCHEDULER_H_