[Chromoting] Remove CHECK() when posting a message to the plugin thread during shutdown. With the a…

remoting/base/auto_thread_task_runner.cc

Index: remoting/base/auto_thread_task_runner.cc
diff --git a/remoting/base/auto_thread_task_runner.cc b/remoting/base/auto_thread_task_runner.cc
index 8d995a22c1c97e06ff7dfc0ad8c366fb95288caf..6d5f0b57dc2582b0b3d8e2e5342824a7edd855bb 100644
--- a/remoting/base/auto_thread_task_runner.cc
+++ b/remoting/base/auto_thread_task_runner.cc
@@ -40,20 +40,14 @@ bool AutoThreadTaskRunner::PostDelayedTask(
     const tracked_objects::Location& from_here,
     const base::Closure& task,
     base::TimeDelta delay) {
-  // CHECK() makes sure that |task_runner_| is still running, - the assumption
-  // made by |AutoThreadTaskRunner| owners.
-  CHECK(task_runner_->PostDelayedTask(from_here, task, delay));
-  return true;
+  return task_runner_->PostDelayedTask(from_here, task, delay);
 }
 
 bool AutoThreadTaskRunner::PostNonNestableDelayedTask(
     const tracked_objects::Location& from_here,
     const base::Closure& task,
     base::TimeDelta delay) {
-  // CHECK() makes sure that |task_runner_| is still running, - the assumption
-  // made by |AutoThreadTaskRunner| owners.
-  CHECK(task_runner_->PostNonNestableDelayedTask(from_here, task, delay));
-  return true;
+  return task_runner_->PostNonNestableDelayedTask(from_here, task, delay);
 }
 
 bool AutoThreadTaskRunner::RunsTasksOnCurrentThread() const {