Notify VRDeviceProviders when there are pages listening for vrdisplayactivate

device/vr/android/gvr/gvr_device_provider.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "device/vr/android/gvr/gvr_device_provider.h"
 
 #include <jni.h>
 
 #include "base/android/context_utils.h"
 #include "base/android/jni_android.h"
@@ skipping 99 matching lines @@
   if (!vr_device_ || !delegate_provider)
     return;
 
   vr_device_->SetDelegate(delegate_provider->GetNonPresentingDelegate());
 
   // Remove GVR gamepad polling.
   GamepadDataFetcherManager::GetInstance()->RemoveSourceFactory(
       GAMEPAD_SOURCE_GVR);
 }
 
+void GvrDeviceProvider::SetListeningForActivate(bool listening) {
+  device::GvrDelegateProvider* delegate_provider =
+      device::GvrDelegateProvider::GetInstance();
+  if (!delegate_provider)
+    return;
+
+  delegate_provider->SetListeningForActivate(listening);
+}
+
 }  // namespace device