Remove code that was only used by navigator.connect.

content/public/common/message_port_types.cc

Index: content/public/common/message_port_types.cc
diff --git a/content/public/common/message_port_types.cc b/content/public/common/message_port_types.cc
deleted file mode 100644
index faf033df7a368b56b47d150d825fce776d50157f..0000000000000000000000000000000000000000
--- a/content/public/common/message_port_types.cc
+++ /dev/null
@@ -1,46 +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.
-
-#include "content/public/common/message_port_types.h"
-
-#include "base/logging.h"
-
-namespace content {
-
-MessagePortMessage::MessagePortMessage() {
-}
-
-MessagePortMessage::MessagePortMessage(const base::string16& message)
-    : message_as_string(message) {
-}
-
-MessagePortMessage::MessagePortMessage(std::unique_ptr<base::Value> message) {
-  message_as_value.Append(message.release());
-}
-
-MessagePortMessage::MessagePortMessage(const MessagePortMessage& other) {
-  *this = other;
-}
-
-MessagePortMessage& MessagePortMessage::operator=(
-    const MessagePortMessage& other) {
-  message_as_string = other.message_as_string;
-  message_as_value.Clear();
-  const base::Value* value;
-  if (other.message_as_value.Get(0, &value))
-    message_as_value.Append(value->DeepCopy());
-  return *this;
-}
-
-MessagePortMessage::~MessagePortMessage() {
-}
-
-const base::Value* MessagePortMessage::as_value() const {
-  const base::Value* value = nullptr;
-  bool result = message_as_value.Get(0, &value);
-  DCHECK(result);
-  return value;
-}
-
-}  // namespace content