media: Quit MojoMediaApplication when no service is bound.

mojo/application/public/cpp/lib/app_lifetime_helper.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "mojo/application/public/cpp/app_lifetime_helper.h"
 
 #include "base/bind.h"
 #include "base/message_loop/message_loop.h"
 #include "mojo/application/public/cpp/application_impl.h"
 
 namespace mojo {
 
 AppRefCount::AppRefCount(
     AppLifetimeHelper* app_lifetime_helper,
+    base::TimeDelta release_delay,
     scoped_refptr<base::SingleThreadTaskRunner> app_task_runner)
     : app_lifetime_helper_(app_lifetime_helper),
+      release_delay_(release_delay),
       app_task_runner_(app_task_runner) {
 }
 
 AppRefCount::~AppRefCount() {
 #ifndef NDEBUG
   // Ensure that this object is used on only one thread at a time, or else there
   // could be races where the object is being reset on one thread and cloned on
   // another.
   if (clone_task_runner_) {
     DCHECK(clone_task_runner_->BelongsToCurrentThread());
   }
 #endif
 
+  if (!release_delay_.is_zero()) {
+    app_task_runner_->PostDelayedTask(
+        FROM_HERE, base::Bind(&AppLifetimeHelper::Release,
+                              base::Unretained(app_lifetime_helper_)),
+        release_delay_);
+    return;
+  }
+
   if (app_task_runner_->BelongsToCurrentThread()) {
     app_lifetime_helper_->Release();
     return;
   }
 
   app_task_runner_->PostTask(
       FROM_HERE,
       base::Bind(&AppLifetimeHelper::Release,
                  base::Unretained(app_lifetime_helper_)));
 }
@@ skipping 12 matching lines @@
   // Ensure that this object is used on only one thread at a time, or else there
   // could be races where the object is being reset on one thread and cloned on
   // another.
   if (clone_task_runner_) {
     DCHECK(clone_task_runner_->BelongsToCurrentThread());
   } else {
     clone_task_runner_ = base::MessageLoop::current()->task_runner();
   }
 #endif
 
-  return make_scoped_ptr(new AppRefCount(
-      app_lifetime_helper_, app_task_runner_));
+  return make_scoped_ptr(
+      new AppRefCount(app_lifetime_helper_, release_delay_, app_task_runner_));
 }
 
 AppLifetimeHelper::AppLifetimeHelper(ApplicationImpl* app)
     : app_(app), ref_count_(0) {
 }
 
 AppLifetimeHelper::~AppLifetimeHelper() {
 }
 
 scoped_ptr<AppRefCount> AppLifetimeHelper::CreateAppRefCount() {
+  return CreateAppRefCount(base::TimeDelta());
+}
+
+scoped_ptr<AppRefCount> AppLifetimeHelper::CreateAppRefCount(
+    base::TimeDelta release_delay) {
   AddRef();
   return make_scoped_ptr(new AppRefCount(
-      this, base::MessageLoop::current()->task_runner()));
+      this, release_delay, base::MessageLoop::current()->task_runner()));
 }
 
 void AppLifetimeHelper::AddRef() {
   ref_count_++;
 }
 
 void AppLifetimeHelper::Release() {
   if (!--ref_count_) {
     if (app_)
       app_->Terminate();
   }
 }
 
 void AppLifetimeHelper::ApplicationTerminated() {
   app_ = nullptr;
 }
 
 }  // namespace mojo