Hook up insecure content warnings for http webVR presentation.

chrome/browser/android/vr_shell/ui_element.cc

Index: chrome/browser/android/vr_shell/ui_element.cc
diff --git a/chrome/browser/android/vr_shell/ui_element.cc b/chrome/browser/android/vr_shell/ui_element.cc
index 8b8c25a3e58d9e1aad8e6d7e08f7df8f22cc9901..6cce172427771b690fbf936b368b0b0ae44fb1a9 100644
--- a/chrome/browser/android/vr_shell/ui_element.cc
+++ b/chrome/browser/android/vr_shell/ui_element.cc
@@ -105,6 +105,13 @@ UiElement::UiElement() = default;
 
 UiElement::~UiElement() = default;
 
+void UiElement::Render(VrShellRenderer* renderer,
+                       vr::Mat4f view_proj_matrix) const {
+  NOTREACHED();
+}
+
+void UiElement::Initialize() {}
+
 void UiElement::Animate(const base::TimeTicks& time) {
   for (auto& it : animations) {
     Animation& animation = *it;