ipc: Make a common subclass for Channel and ProxyChannel.

ipc/attachment_broker_privileged_win.cc

 // 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 "ipc/attachment_broker_privileged_win.h"
 
 #include <windows.h>
 
 #include "base/process/process.h"
 #include "ipc/attachment_broker_messages.h"
@@ skipping 57 matching lines @@
   // This process is the destination.
   if (wire_format.destination_process == base::Process::Current().Pid()) {
     scoped_refptr<BrokerableAttachment> attachment(
         new internal::HandleAttachmentWin(wire_format));
     HandleReceivedAttachment(attachment);
     return;
   }
 
   // Another process is the destination.
   base::ProcessId dest = wire_format.destination_process;
-  Channel* channel = GetChannelWithProcessId(dest);
-  if (!channel) {
+  Sender* sender = GetSenderWithProcessId(dest);
+  if (!sender) {
     // Assuming that this message was not sent from a malicious process, the
     // channel endpoint that would have received this message will block
     // forever.
     LOG(ERROR) << "Failed to deliver brokerable attachment to process with id: "
                << dest;
     return;
   }
 
-  channel->Send(
-      new AttachmentBrokerMsg_WinHandleHasBeenDuplicated(wire_format));
+  sender->Send(new AttachmentBrokerMsg_WinHandleHasBeenDuplicated(wire_format));
 }
 
 AttachmentBrokerPrivilegedWin::HandleWireFormat
 AttachmentBrokerPrivilegedWin::DuplicateWinHandle(
     const HandleWireFormat& wire_format,
     base::ProcessId source_pid) {
   HandleWireFormat new_wire_format;
   new_wire_format.destination_process = wire_format.destination_process;
   new_wire_format.attachment_id = wire_format.attachment_id;
 
@@ skipping 10 matching lines @@
                                      FALSE, DUPLICATE_SAME_ACCESS);
 
     new_wire_format.handle = (result != 0) ? HandleToLong(new_handle) : 0;
   } else {
     new_wire_format.handle = 0;
   }
   return new_wire_format;
 }
 
 }  // namespace IPC