mojo: terminate apps if the shell goes away

mojo/service_manager/background_shell_service_loader.cc

Index: mojo/service_manager/background_shell_service_loader.cc
diff --git a/mojo/service_manager/background_shell_service_loader.cc b/mojo/service_manager/background_shell_service_loader.cc
index 6d7a2582108628a29c9a728b9be3886ffe978b46..ef97255f283cc87fde323d617f9c6473890263a3 100644
--- a/mojo/service_manager/background_shell_service_loader.cc
+++ b/mojo/service_manager/background_shell_service_loader.cc
@@ -35,8 +35,7 @@ BackgroundShellServiceLoader::BackgroundShellServiceLoader(
     scoped_ptr<ServiceLoader> real_loader,
     const std::string& thread_name,
     base::MessageLoop::Type message_loop_type)
-    : quit_on_shutdown_(false),
-      loader_(real_loader.Pass()),
+    : loader_(real_loader.Pass()),
       message_loop_type_(message_loop_type),
       thread_name_(thread_name),
       message_loop_created_(true, false),
@@ -44,11 +43,8 @@ BackgroundShellServiceLoader::BackgroundShellServiceLoader(
 }
 
 BackgroundShellServiceLoader::~BackgroundShellServiceLoader() {
-  if (thread_) {
-    if (quit_on_shutdown_)
-      task_runner_->PostTask(FROM_HERE, quit_closure_);
+  if (thread_)
     thread_->Join();
-  }
 }
 
 void BackgroundShellServiceLoader::LoadService(