Remove code that was only used by navigator.connect.

content/public/common/message_port_types.h

Index: content/public/common/message_port_types.h
diff --git a/content/public/common/message_port_types.h b/content/public/common/message_port_types.h
deleted file mode 100644
index cfcce9f4797a4160cb8117c7602f713f3eb3a0e6..0000000000000000000000000000000000000000
--- a/content/public/common/message_port_types.h
+++ /dev/null
@@ -1,48 +0,0 @@
-// 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 CONTENT_PUBLIC_COMMON_MESSAGE_PORT_TYPES_H_
-#define CONTENT_PUBLIC_COMMON_MESSAGE_PORT_TYPES_H_
-
-#include <memory>
-#include <vector>
-
-#include "base/strings/string16.h"
-#include "base/values.h"
-#include "content/common/content_export.h"
-#include "ipc/ipc_message.h"
-
-namespace content {
-
-// Struct representing a message sent across a message port. This struct hides
-// the fact that messages can be serialized/encoded in multiple ways from code
-// that doesn't care about the message contents.
-struct CONTENT_EXPORT MessagePortMessage {
-  MessagePortMessage();
-  explicit MessagePortMessage(const base::string16& message);
-  explicit MessagePortMessage(std::unique_ptr<base::Value> message);
-  MessagePortMessage(const MessagePortMessage& other);
-  MessagePortMessage& operator=(const MessagePortMessage& other);
-  ~MessagePortMessage();
-
-  bool is_string() const { return !message_as_string.empty(); }
-  bool is_value() const { return !message_as_value.empty(); }
-  const base::Value* as_value() const;
-
-  // Message serialized using blink::WebSerializedScriptValue. Only one of
-  // |message_as_string| and |message_as_value| should be non-empty.
-  base::string16 message_as_string;
-  // Message as a base::Value. This is either an empty list or a list
-  // containing exactly one item.
-  base::ListValue message_as_value;
-};
-
-struct TransferredMessagePort {
-  int id = MSG_ROUTING_NONE;
-  bool send_messages_as_values = false;
-};
-
-}  // namespace content
-
-#endif  // CONTENT_PUBLIC_COMMON_MESSAGE_PORT_TYPES_H_