Clean up threading around VR Scene updates.

chrome/browser/ui/webui/vr_shell/vr_shell_ui_message_handler.cc

Index: chrome/browser/ui/webui/vr_shell/vr_shell_ui_message_handler.cc
diff --git a/chrome/browser/ui/webui/vr_shell/vr_shell_ui_message_handler.cc b/chrome/browser/ui/webui/vr_shell/vr_shell_ui_message_handler.cc
index 3670e28cd842dc74dec67b3b89177bf32342a401..64774efbc464a46fd6b244df210bb11cee15bca9 100644
--- a/chrome/browser/ui/webui/vr_shell/vr_shell_ui_message_handler.cc
+++ b/chrome/browser/ui/webui/vr_shell/vr_shell_ui_message_handler.cc
@@ -58,16 +58,7 @@ void VrShellUIMessageHandler::OnJavascriptAllowed() {
 void VrShellUIMessageHandler::HandleUpdateScene(const base::ListValue* args) {
   if (!vr_shell_)
     return;
-
-  // Copy the update instructions and handle them on the render thread.
-  // TODO(mthiesse): Clean this up.
-  auto cb = base::Bind(&vr_shell::UiScene::HandleCommands,
-                       // Unretained is safe because this callback will only be
-                       // run on the GL thread, which owns the scene.
-                       base::Unretained(vr_shell_->GetScene()),
-                       base::Owned(args->CreateDeepCopy().release()),
-                       vr_shell::UiScene::TimeInMicroseconds());
-  vr_shell_->QueueTask(cb);
+  vr_shell_->UpdateScene(args);
 }
 
 void VrShellUIMessageHandler::HandleDoAction(const base::ListValue* args) {