Revert of Update AuraInit to handle failed initialization

mash/task_viewer/task_viewer.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 "mash/task_viewer/task_viewer.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include "base/bind.h"
@@ skipping 276 matching lines @@
 
 void TaskViewer::RemoveWindow(views::Widget* widget) {
   auto it = std::find(windows_.begin(), windows_.end(), widget);
   DCHECK(it != windows_.end());
   windows_.erase(it);
   if (windows_.empty())
     base::MessageLoop::current()->QuitWhenIdle();
 }
 
 void TaskViewer::OnStart() {
-  aura_init_ = views::AuraInit::Create(
+  aura_init_ = base::MakeUnique<views::AuraInit>(
       context()->connector(), context()->identity(), "views_mus_resources.pak",
       std::string(), nullptr, views::AuraInit::Mode::AURA_MUS);
-  if (!aura_init_)
-    context()->QuitNow();
 }
 
 void TaskViewer::OnBindInterface(
     const service_manager::BindSourceInfo& source_info,
     const std::string& interface_name,
     mojo::ScopedMessagePipeHandle interface_pipe) {
   registry_.BindInterface(source_info, interface_name,
                           std::move(interface_pipe));
 }
 
@@ skipping 22 matching lines @@
   service_manager->AddListener(std::move(listener));
 }
 
 void TaskViewer::Create(const service_manager::BindSourceInfo& source_info,
                         ::mash::mojom::LaunchableRequest request) {
   bindings_.AddBinding(this, std::move(request));
 }
 
 }  // namespace task_viewer
 }  // namespace main