Notify VRDeviceProviders when there are pages listening for vrdisplayactivate

chrome/browser/android/vr_shell/vr_shell_delegate.cc

Index: chrome/browser/android/vr_shell/vr_shell_delegate.cc
diff --git a/chrome/browser/android/vr_shell/vr_shell_delegate.cc b/chrome/browser/android/vr_shell/vr_shell_delegate.cc
index cd01c36309d3b1f1be210be0c199200019a69616..d9881716965e878ed6358273df00e9c6c1015f34 100644
--- a/chrome/browser/android/vr_shell/vr_shell_delegate.cc
+++ b/chrome/browser/android/vr_shell/vr_shell_delegate.cc
@@ -108,6 +108,12 @@ void VrShellDelegate::DestroyNonPresentingDelegate() {
   }
 }
 
+void VrShellDelegate::SetListeningForActivate(bool listening) {
+  JNIEnv* env = AttachCurrentThread();
+  Java_VrShellDelegate_setListeningForWebVrActivate(
+      env, j_vr_shell_delegate_.obj(), listening);
+}
+
 // ----------------------------------------------------------------------------
 // Native JNI methods
 // ----------------------------------------------------------------------------