Revert of Remote assistance on Chrome OS Part IV - It2MeHost

remoting/host/policy_hack/policy_watcher.cc

Index: remoting/host/policy_hack/policy_watcher.cc
diff --git a/remoting/host/policy_hack/policy_watcher.cc b/remoting/host/policy_hack/policy_watcher.cc
index 8e30c241ae98da24b25d1da2d87a6db6c3dabfcd..e603cf5032459caaea20f88d40671df5d4aaa0cc 100644
--- a/remoting/host/policy_hack/policy_watcher.cc
+++ b/remoting/host/policy_hack/policy_watcher.cc
@@ -12,6 +12,7 @@
 #include "base/location.h"
 #include "base/memory/weak_ptr.h"
 #include "base/single_thread_task_runner.h"
+#include "base/synchronization/waitable_event.h"
 #include "base/time/time.h"
 #include "base/values.h"
 #include "remoting/host/dns_blackhole_checker.h"
@@ -164,17 +165,19 @@
   StartWatchingInternal();
 }
 
-void PolicyWatcher::StopWatching(const base::Closure& stopped_callback) {
-  task_runner_->PostTaskAndReply(
-      FROM_HERE, base::Bind(&PolicyWatcher::StopWatchingOnPolicyWatcherThread,
-                            base::Unretained(this)),
-      stopped_callback);
-}
-
-void PolicyWatcher::StopWatchingOnPolicyWatcherThread() {
+void PolicyWatcher::StopWatching(base::WaitableEvent* done) {
+  if (!OnPolicyWatcherThread()) {
+    task_runner_->PostTask(FROM_HERE,
+                           base::Bind(&PolicyWatcher::StopWatching,
+                                      base::Unretained(this), done));
+    return;
+  }
+
   StopWatchingInternal();
   weak_factory_.InvalidateWeakPtrs();
   policy_callback_.Reset();
+
+  done->Signal();
 }
 
 void PolicyWatcher::ScheduleFallbackReloadTask() {