Support showing loading progress in the VR omnibox.

chrome/browser/android/vr_shell/vr_web_contents_observer.cc

Index: chrome/browser/android/vr_shell/vr_web_contents_observer.cc
diff --git a/chrome/browser/android/vr_shell/vr_web_contents_observer.cc b/chrome/browser/android/vr_shell/vr_web_contents_observer.cc
index d36a68cf80cd7b19057c826d4eff89eefc65354b..6e17469813c1022ae858f18615ee326268bd3077 100644
--- a/chrome/browser/android/vr_shell/vr_web_contents_observer.cc
+++ b/chrome/browser/android/vr_shell/vr_web_contents_observer.cc
@@ -91,4 +91,8 @@ void VrWebContentsObserver::RenderViewHostChanged(
   new_host->GetWidget()->GetView()->SetShowingOverscrollGlow(false);
 }
 
+void VrWebContentsObserver::DidChangeLoadProgress(double progress) {
+  ui_interface_->SetLoadingProgress(progress);
+}
+
 }  // namespace vr_shell