Get rid of KeepAlive. Quit shell when all urls run directly by Context are closed.

mojo/shell/out_of_process_dynamic_service_runner.cc

 // Copyright 2014 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/shell/out_of_process_dynamic_service_runner.h"
 
 #include "base/bind.h"
 #include "base/callback_helpers.h"
 #include "base/file_util.h"
 #include "base/logging.h"
 #include "base/scoped_native_library.h"
 
 namespace mojo {
 namespace shell {
 
 OutOfProcessDynamicServiceRunner::OutOfProcessDynamicServiceRunner(
     Context* context)
-    : context_(context),
-      keep_alive_(context) {
+    : context_(context) {
 }
 
 OutOfProcessDynamicServiceRunner::~OutOfProcessDynamicServiceRunner() {
   if (app_child_process_host_) {
     // TODO(vtl): Race condition: If |AppChildProcessHost::DidStart()| hasn't
     // been called yet, we shouldn't call |Join()| here. (Until |DidStart()|, we
     // may not have a child process to wait on.) Probably we should fix
     // |Join()|.
     app_child_process_host_->Join();
   }
@@ skipping 25 matching lines @@
   DVLOG(2) << "OutOfProcessDynamicServiceRunner::AppCompleted(" << result
            << ")";
 
   app_completed_callback_.Run();
   app_completed_callback_.Reset();
   app_child_process_host_.reset();
 }
 
 }  // namespace shell
 }  // namespace mojo