Crash the network or desktop process when an unknown IPC message is received.

remoting/host/desktop_session_proxy.cc

 // Copyright (c) 2012 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 "remoting/host/desktop_session_proxy.h"
 
 #include "base/compiler_specific.h"
 #include "base/logging.h"
 #include "base/platform_file.h"
 #include "base/process_util.h"
@@ skipping 76 matching lines @@
     IPC_MESSAGE_HANDLER(ChromotingDesktopNetworkMsg_CreateSharedBuffer,
                         OnCreateSharedBuffer)
     IPC_MESSAGE_HANDLER(ChromotingDesktopNetworkMsg_ReleaseSharedBuffer,
                         OnReleaseSharedBuffer)
     IPC_MESSAGE_HANDLER(ChromotingDesktopNetworkMsg_InjectClipboardEvent,
                         OnInjectClipboardEvent)
     IPC_MESSAGE_HANDLER(ChromotingDesktopNetworkMsg_DisconnectSession,
                         DisconnectSession);
   IPC_END_MESSAGE_MAP()
 
+  CHECK(handled) << "An unexpected IPC message received: type="
+                 << message.type();
   return handled;
 }
 
 void DesktopSessionProxy::OnChannelConnected(int32 peer_pid) {
   DCHECK(caller_task_runner_->BelongsToCurrentThread());
 
   VLOG(1) << "IPC: network <- desktop (" << peer_pid << ")";
 }
 
 void DesktopSessionProxy::OnChannelError() {
@@ skipping 357 matching lines @@
   DCHECK(caller_task_runner_->BelongsToCurrentThread());
 
   if (desktop_channel_) {
     desktop_channel_->Send(message);
   } else {
     delete message;
   }
 }
 
 }  // namespace remoting