Add menu mode plumbing for WebVR mode.

chrome/browser/android/vr_shell/ui_scene.cc

Index: chrome/browser/android/vr_shell/ui_scene.cc
diff --git a/chrome/browser/android/vr_shell/ui_scene.cc b/chrome/browser/android/vr_shell/ui_scene.cc
index 2b6ac528c82a547114659117f69dbd429b973765..382a31a4486372b8c7e638b86f0eb0ae7f7f78c5 100644
--- a/chrome/browser/android/vr_shell/ui_scene.cc
+++ b/chrome/browser/android/vr_shell/ui_scene.cc
@@ -284,11 +284,6 @@ void UiScene::RemoveAnimation(int element_id, int animation_id) {
   }
 }
 
-void UiScene::UpdateBackgroundFromDict(const base::DictionaryValue& dict) {
-  ParseColorf(dict, "color", &background_color_);
-  ParseFloat(dict, "distance", &background_distance_);
-}
-
 void UiScene::HandleCommands(std::unique_ptr<base::ListValue> commands,
                              int64_t time_in_micro) {
   for (auto& item : *commands) {
@@ -323,8 +318,10 @@ void UiScene::HandleCommands(std::unique_ptr<base::ListValue> commands,
         RemoveAnimation(element_id, animation_id);
         break;
       }
-      case Command::UPDATE_BACKGROUND:
-        UpdateBackgroundFromDict(*data);
+      case Command::CONFIGURE_SCENE:
+        ParseColorf(*data, "backgroundColor", &background_color_);
+        ParseFloat(*data, "backgroundDistance", &background_distance_);
+        data->GetBoolean("drawWebVr", &webvr_rendering_enabled_);
         break;
     }
   }
@@ -357,14 +354,18 @@ ContentRectangle* UiScene::GetUiElementById(int element_id) {
   return nullptr;
 }
 
-const Colorf& UiScene::GetBackgroundColor() {
+const Colorf& UiScene::GetBackgroundColor() const {
   return background_color_;
 }
 
-float UiScene::GetBackgroundDistance() {
+float UiScene::GetBackgroundDistance() const {
   return background_distance_;
 }
 
+bool UiScene::GetWebVrRenderingEnabled() const {
+  return webvr_rendering_enabled_;
+}
+
 const std::vector<std::unique_ptr<ContentRectangle>>& UiScene::GetUiElements()
     const {
   return ui_elements_;