Adding a unit test to verify the IPC channel between the network and desktop processes.

remoting/host/daemon_process_win.cc

Index: remoting/host/daemon_process_win.cc
diff --git a/remoting/host/daemon_process_win.cc b/remoting/host/daemon_process_win.cc
index 51ee12a6ec452410db27157220b52d40b929af24..9c9ea48d13f78ff07f0f0133dd0631d62e6cf207 100644
--- a/remoting/host/daemon_process_win.cc
+++ b/remoting/host/daemon_process_win.cc
@@ -10,6 +10,7 @@
 #include "base/logging.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
+#include "base/process.h"
 #include "base/single_thread_task_runner.h"
 #include "base/time.h"
 #include "base/timer.h"
@@ -108,15 +109,20 @@ bool DaemonProcessWin::OnDesktopSessionAgentAttached(
     base::ProcessHandle desktop_process,
     IPC::PlatformFileForTransit desktop_pipe) {
   // Prepare |desktop_process| handle for sending over to the network process.
-  // |desktop_pipe| is a handle in the desktop process. It will be duplicated
-  // by the network process directly from the desktop process.
-  IPC::PlatformFileForTransit desktop_process_for_transit =
-      IPC::GetFileHandleForProcess(desktop_process, network_process_, false);
-  if (desktop_process_for_transit == IPC::InvalidPlatformFileForTransit()) {
-    LOG(ERROR) << "Failed to duplicate the desktop process handle";
+  base::ProcessHandle desktop_process_for_transit;
+  if (!DuplicateHandle(GetCurrentProcess(),
+                       desktop_process,
+                       network_process_,
+                       &desktop_process_for_transit,
+                       0,
+                       FALSE,
+                       DUPLICATE_SAME_ACCESS)) {
+    LOG_GETLASTERROR(ERROR) << "Failed to duplicate the desktop process handle";
     return false;
   }
 
+  // |desktop_pipe| is a handle in the desktop process. It will be duplicated
+  // by the network process directly from the desktop process.
   SendToNetwork(new ChromotingDaemonNetworkMsg_DesktopAttached(
       terminal_id, desktop_process_for_transit, desktop_pipe));
   return true;