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

remoting/host/desktop_process.cc

Index: remoting/host/desktop_process.cc
diff --git a/remoting/host/desktop_process.cc b/remoting/host/desktop_process.cc
index a994e2207dce8d50d82b79a41a75275acdc03e09..2ff6f2de32fe0658c5a86088e5289de50e915b77 100644
--- a/remoting/host/desktop_process.cc
+++ b/remoting/host/desktop_process.cc
@@ -61,6 +61,9 @@ bool DesktopProcess::OnMessageReceived(const IPC::Message& message) {
     IPC_MESSAGE_HANDLER(ChromotingDaemonDesktopMsg_Crash, OnCrash)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
+
+  CHECK(handled) << "An unexpected IPC message received: type="

[Wez, 2013/03/04 23:17:09]

nit: "Received unexpected IPC type:"?

[alexeypa (please no reviews), 2013/03/05 00:01:44]

Done.

+                 << message.type();
   return handled;
 }