Add passive and FOV-locked properties to UI elements.

chrome/browser/android/vr_shell/vr_shell.h

Index: chrome/browser/android/vr_shell/vr_shell.h
diff --git a/chrome/browser/android/vr_shell/vr_shell.h b/chrome/browser/android/vr_shell/vr_shell.h
index dce6bcb6a8df3748478887a4ad3dd3986a560eb8..a1795da49479785615db14724fba575728e6ce4b 100644
--- a/chrome/browser/android/vr_shell/vr_shell.h
+++ b/chrome/browser/android/vr_shell/vr_shell.h
@@ -120,9 +120,11 @@ class VrShell : public device::GvrDelegate {
   // initialized by checking IsUiTextureReady() first.
   Rectf MakeUiGlCopyRect(Recti pixel_rect);
   void DrawVrShell(const gvr::Mat4f& head_pose);
-  void DrawEye(const gvr::Mat4f& view_matrix,
+  void DrawEye(gvr::Eye eye,
+               const gvr::Mat4f& head_pose,
                const gvr::BufferViewport& params);
-  void DrawUI(const gvr::Mat4f& render_matrix);
+  void DrawUI(const gvr::Mat4f& world_matrix,
+              const gvr::Mat4f& fov_matrix);
   void DrawCursor(const gvr::Mat4f& render_matrix);
   void DrawWebVr();
   void DrawWebVrOverlay(int64_t present_time_nanos);