Rotate screen in response to accelerator or device orientation sensors.

athena/main/athena_launcher.cc

Index: athena/main/athena_launcher.cc
diff --git a/athena/main/athena_launcher.cc b/athena/main/athena_launcher.cc
index 04b55a77f2981ad82955f8b15ebdfe329f1622e3..e417878fe5960b1562f87f6b3f91a991a2941094 100644
--- a/athena/main/athena_launcher.cc
+++ b/athena/main/athena_launcher.cc
@@ -13,6 +13,7 @@
 #include "athena/system/public/system_ui.h"
 #include "athena/wm/public/window_manager.h"
 #include "base/memory/scoped_ptr.h"
+#include "content/public/browser/browser_thread.h"
 #include "ui/aura/window_property.h"
 #include "ui/views/views_delegate.h"
 #include "ui/wm/core/visibility_controller.h"
@@ -69,7 +70,9 @@ void StartAthena(aura::Window* root_window,
   aura::client::SetVisibilityClient(root_window,
                                     root_window_state->visibility_client.get());
 
-  athena::SystemUI::Create();
+  athena::SystemUI::Create(
+      content::BrowserThread::GetMessageLoopProxyForThread(
+          content::BrowserThread::IO));
   athena::InputManager::Create()->OnRootWindowCreated(root_window);
   athena::ScreenManager::Create(root_window);
   athena::WindowManager::Create();