VR: Further split common code from Android-specific code.

chrome/browser/android/vr_shell/ui_scene_unittest.cc

Index: chrome/browser/android/vr_shell/ui_scene_unittest.cc
diff --git a/chrome/browser/android/vr_shell/ui_scene_unittest.cc b/chrome/browser/android/vr_shell/ui_scene_unittest.cc
index 1f5f81d7ad513d564e5b438d6d351703c153832d..2a14566c3708cb87e92dfdc62f4a112ec2cacb56 100644
--- a/chrome/browser/android/vr_shell/ui_scene_unittest.cc
+++ b/chrome/browser/android/vr_shell/ui_scene_unittest.cc
@@ -48,7 +48,7 @@ void addAnimation(UiScene* scene,
                   int animation_id,
                   Animation::Property property) {
   std::unique_ptr<easing::Easing> easing = base::MakeUnique<easing::Linear>();
-  std::vector<float> from = {};
+  std::vector<float> from;
   std::vector<float> to = {1, 1, 1, 1};
   auto animation =
       base::MakeUnique<Animation>(animation_id, property, std::move(easing),