Remove all blimp network code.

blimp/net/blob_channel/helium_blob_receiver_delegate.h

-// Copyright 2016 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_BLOB_CHANNEL_HELIUM_BLOB_RECEIVER_DELEGATE_H_
-#define BLIMP_NET_BLOB_CHANNEL_HELIUM_BLOB_RECEIVER_DELEGATE_H_
-
-#include <memory>
-
-#include "blimp/net/blimp_message_processor.h"
-#include "blimp/net/blimp_net_export.h"
-#include "blimp/net/blob_channel/blob_channel_receiver.h"
-#include "net/base/completion_callback.h"
-
-namespace blimp {
-
-// Receives and processes incoming blob messages in BlimpMessage format and
-// passes them to an attached BlobChannelReceiver.
-// The caller must provide the receiver object via SetReceiver() before any
-// messages can be processed.
-class BLIMP_NET_EXPORT HeliumBlobReceiverDelegate
-    : public BlobChannelReceiver::Delegate,
-      public BlimpMessageProcessor {
- public:
-  HeliumBlobReceiverDelegate();
-  ~HeliumBlobReceiverDelegate() override;
-
-  // Sets the Receiver object which will take incoming blobs.
-  void SetReceiver(BlobChannelReceiver* receiver) override;
-
- private:
-  // BlimpMessageProcessor implementation.
-  void ProcessMessage(std::unique_ptr<BlimpMessage> message,
-                      const net::CompletionCallback& callback) override;
-
-  BlobChannelReceiver* receiver_ = nullptr;
-
-  DISALLOW_COPY_AND_ASSIGN(HeliumBlobReceiverDelegate);
-};
-
-}  // namespace blimp
-
-#endif  // BLIMP_NET_BLOB_CHANNEL_HELIUM_BLOB_RECEIVER_DELEGATE_H_