Make Mandoline shut down cleanly.

components/native_viewport/native_viewport_application_delegate.cc

Index: components/native_viewport/native_viewport_application_delegate.cc
diff --git a/components/native_viewport/native_viewport_application_delegate.cc b/components/native_viewport/native_viewport_application_delegate.cc
index 4f247c7a5c55a20feedee52352257dc7d6b7d56a..365b7f710767670cf2d475f4fbe0d3e500febe8c 100644
--- a/components/native_viewport/native_viewport_application_delegate.cc
+++ b/components/native_viewport/native_viewport_application_delegate.cc
@@ -10,6 +10,7 @@
 #include "mojo/application/public/cpp/application_connection.h"
 #include "mojo/application/public/cpp/application_impl.h"
 #include "ui/events/event_switches.h"
+#include "ui/events/platform/platform_event_source.h"
 #include "ui/gl/gl_surface.h"
 
 namespace native_viewport {
@@ -23,6 +24,7 @@ NativeViewportApplicationDelegate::~NativeViewportApplicationDelegate() {
 
 void NativeViewportApplicationDelegate::Initialize(
     mojo::ApplicationImpl* application) {
+  event_source_ = ui::PlatformEventSource::CreateDefault();
   tracing_.Initialize(application);
 
   base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
@@ -47,7 +49,8 @@ void NativeViewportApplicationDelegate::Create(
     mojo::InterfaceRequest<mojo::NativeViewport> request) {
   if (!gpu_state_.get())
     gpu_state_ = new gles2::GpuState;
-  new NativeViewportImpl(is_headless_, gpu_state_, request.Pass());
+  new NativeViewportImpl(is_headless_, gpu_state_, request.Pass(),
+                         app_lifetime_helper_.CreateAppRefCount());
 }
 
 void NativeViewportApplicationDelegate::Create(