Wire the VR omnibox directly to visible security state changes.

chrome/browser/android/vr_shell/vr_web_contents_observer.h

Index: chrome/browser/android/vr_shell/vr_web_contents_observer.h
diff --git a/chrome/browser/android/vr_shell/vr_web_contents_observer.h b/chrome/browser/android/vr_shell/vr_web_contents_observer.h
index e362e51eddbca76434a69d88207f3b910ab39771..03e7d086e3287c4ad448ca09559a505dacf3c13b 100644
--- a/chrome/browser/android/vr_shell/vr_web_contents_observer.h
+++ b/chrome/browser/android/vr_shell/vr_web_contents_observer.h
@@ -39,6 +39,9 @@ class CONTENT_EXPORT VrWebContentsObserver
       content::NavigationHandle* navigation_handle) override;
   void DidToggleFullscreenModeForTab(
       bool entered_fullscreen, bool will_cause_resize) override;
+  void SecurityStyleChanged(
+      blink::WebSecurityStyle security_style,
+      const content::SecurityStyleExplanations& explanations) override;
   void WebContentsDestroyed() override;
   void WasHidden() override;
   void RenderViewHostChanged(content::RenderViewHost* old_host,