[Chromoting] Implement host safe-mode

remoting/host/win/worker_process_launcher.cc

Index: remoting/host/win/worker_process_launcher.cc
diff --git a/remoting/host/win/worker_process_launcher.cc b/remoting/host/win/worker_process_launcher.cc
index e4bf86cd34650722b1379e60033f044a6a8b616b..c46f85d268eb60fe5072192b9ea8708ffc280247 100644
--- a/remoting/host/win/worker_process_launcher.cc
+++ b/remoting/host/win/worker_process_launcher.cc
@@ -8,11 +8,13 @@
 
 #include "base/location.h"
 #include "base/logging.h"
+#include "base/memory/ptr_util.h"
 #include "base/single_thread_task_runner.h"
 #include "base/time/time.h"
 #include "ipc/ipc_message.h"
 #include "remoting/host/chromoting_messages.h"
 #include "remoting/host/host_exit_codes.h"
+#include "remoting/host/switches.h"
 #include "remoting/host/worker_process_ipc_delegate.h"
 
 using base::TimeDelta;
@@ -163,6 +165,16 @@ void WorkerProcessLauncher::OnChannelError() {
   }
 }
 
+void WorkerProcessLauncher::AppendSwitches(
+    base::CommandLine* command_line) const {
+  DCHECK(command_line);
+  if (start_counter_ == 1) {
+    return;
+  }
+
+  command_line->AppendSwitch(kSafeMode);
+}
+
 void WorkerProcessLauncher::OnObjectSignaled(HANDLE object) {
   DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
   DCHECK(!process_watcher_.GetWatchedObject());
@@ -189,6 +201,7 @@ void WorkerProcessLauncher::LaunchWorker() {
 
   exit_code_ = CONTROL_C_EXIT;
 
+  start_counter_++;
   // Make sure launching a process will not take forever.
   launch_result_timer_.Start(
       FROM_HERE, base::TimeDelta::FromSeconds(kLaunchResultTimeoutSeconds),