Remove all blimp network code.

blimp/net/packet_writer.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 BLIMP_NET_PACKET_WRITER_H_
-#define BLIMP_NET_PACKET_WRITER_H_
-
-#include <string>
-
-#include "base/macros.h"
-#include "blimp/net/blimp_net_export.h"
-#include "net/base/completion_callback.h"
-#include "net/base/io_buffer.h"
-#include "net/base/net_errors.h"
-
-namespace blimp {
-
-// Interface to describe a writer which can write variable-length data packets
-// to a connection.
-class BLIMP_NET_EXPORT PacketWriter {
- public:
-  virtual ~PacketWriter() {}
-
-  // Invokes |cb| with net::OK if the write operation executed successfully.
-  // All other values indicate unrecoverable errors.
-  // |callback| must not be invoked if |this| is deleted.
-  virtual void WritePacket(const scoped_refptr<net::DrainableIOBuffer>& data,
-                           const net::CompletionCallback& callback) = 0;
-};
-
-}  // namespace blimp
-
-#endif  // BLIMP_NET_PACKET_WRITER_H_