Move shared files in net/quic/ into net/quic/core/

net/quic/quic_write_blocked_list.cc

-// 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.
-
-#include "net/quic/quic_write_blocked_list.h"
-
-namespace net {
-
-QuicWriteBlockedList::QuicWriteBlockedList()
-    : last_priority_popped_(0),
-      crypto_stream_blocked_(false),
-      headers_stream_blocked_(false) {
-  memset(batch_write_stream_id_, 0, sizeof(batch_write_stream_id_));
-  memset(bytes_left_for_batch_write_, 0, sizeof(bytes_left_for_batch_write_));
-}
-
-QuicWriteBlockedList::~QuicWriteBlockedList() {}
-
-}  // namespace net