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

mojo/shell/in_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/in_process_dynamic_service_runner.h"
 
 #include "base/bind.h"
 #include "base/callback_helpers.h"
 #include "base/location.h"
 #include "base/logging.h"
@@ skipping 23 matching lines @@
   if (expected_size > sizeof(Thunks)) {
     LOG(ERROR) << "Invalid app library: expected " << function_name
                << " to return thunks of size: " << expected_size;
     return false;
   }
   return true;
 }
 }
 
 InProcessDynamicServiceRunner::InProcessDynamicServiceRunner(
-    Context* context)
-    : keep_alive_(context) {
+    Context* context) {
 }
 
 InProcessDynamicServiceRunner::~InProcessDynamicServiceRunner() {
   if (thread_) {
     DCHECK(thread_->HasBeenStarted());
     DCHECK(!thread_->HasBeenJoined());
     thread_->Join();
   }
 
   // It is important to let the thread exit before unloading the DSO because
@@ skipping 89 matching lines @@
       LOG(ERROR) << "MojoMain returned an error: " << result;
   } while (false);
 
   bool success = app_completed_callback_runner_.Run();
   app_completed_callback_runner_.Reset();
   LOG_IF(ERROR, !success) << "Failed post run app_completed_callback";
 }
 
 }  // namespace shell
 }  // namespace mojo