Remove IPC::Endpoint.

ipc/ipc_test_sink.h

 // Copyright (c) 2011 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 IPC_IPC_TEST_SINK_H_
 #define IPC_IPC_TEST_SINK_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 72 matching lines @@
 class TestSink : public Channel {
  public:
   TestSink();
   ~TestSink() override;
 
   // Interface in IPC::Channel. This copies the message to the sink and then
   // deletes it.
   bool Send(IPC::Message* message) override;
   bool Connect() override WARN_UNUSED_RESULT;
   void Close() override;
-  base::ProcessId GetPeerPID() const override;
 
   // Used by the source of the messages to send the message to the sink. This
   // will make a copy of the message and store it in the list.
   bool OnMessageReceived(const Message& msg);
 
   // Returns the number of messages in the queue.
   size_t message_count() const { return messages_.size(); }
 
   // Clears the message queue of saved messages.
   void ClearMessages();
@@ skipping 29 matching lines @@
   // The actual list of received messages.
   std::vector<Message> messages_;
   base::ObserverList<Listener> filter_list_;
 
   DISALLOW_COPY_AND_ASSIGN(TestSink);
 };
 
 }  // namespace IPC
 
 #endif  // IPC_IPC_TEST_SINK_H_