The worker process launcher can now ask the worker to crash.

remoting/host/win/wts_session_process_delegate.cc

Index: remoting/host/win/wts_session_process_delegate.cc
diff --git a/remoting/host/win/wts_session_process_delegate.cc b/remoting/host/win/wts_session_process_delegate.cc
index 74659f7aa7642538eccc6b0d86a286240c094dce..434e5df1e3bfba3208a608d6fe8c1c527ed6c4a1 100644
--- a/remoting/host/win/wts_session_process_delegate.cc
+++ b/remoting/host/win/wts_session_process_delegate.cc
@@ -62,6 +62,7 @@ class WtsSessionProcessDelegate::Core
   virtual bool Send(IPC::Message* message) OVERRIDE;
 
   // WorkerProcessLauncher::Delegate implementation.
+  virtual void CloseChannel() OVERRIDE;
   virtual DWORD GetProcessId() const OVERRIDE;
   virtual bool IsPermanentError(int failure_count) const OVERRIDE;
   virtual void KillProcess(DWORD exit_code) OVERRIDE;
@@ -173,7 +174,7 @@ void WtsSessionProcessDelegate::Core::OnIOCompleted(
 bool WtsSessionProcessDelegate::Core::Send(IPC::Message* message) {
   DCHECK(main_task_runner_->BelongsToCurrentThread());
 
-  if (channel_.get()) {
+  if (channel_) {
     return channel_->Send(message);
   } else {
     delete message;
@@ -181,6 +182,13 @@ bool WtsSessionProcessDelegate::Core::Send(IPC::Message* message) {
   }
 }
 
+void WtsSessionProcessDelegate::Core::CloseChannel() {
+  DCHECK(main_task_runner_->BelongsToCurrentThread());
+
+  channel_.reset();
+  pipe_.Close();
+}
+
 DWORD WtsSessionProcessDelegate::Core::GetProcessId() const {
   DWORD pid = 0;
   if (launch_elevated_ && pipe_.IsValid() &&
@@ -496,6 +504,11 @@ bool WtsSessionProcessDelegate::Send(IPC::Message* message) {
   return core_->Send(message);
 }
 
+void WtsSessionProcessDelegate::CloseChannel() {
+  if (core_)
+    core_->CloseChannel();
+}
+
 DWORD WtsSessionProcessDelegate::GetProcessId() const {
   if (!core_)
     return 0;