Notify VRDeviceProviders when there are pages listening for vrdisplayactivate

device/vr/vr_service_impl.h

 // 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.
 
 #ifndef DEVICE_VR_VR_SERVICE_IMPL_H
 #define DEVICE_VR_VR_SERVICE_IMPL_H
 
 #include <memory>
 
 #include "base/macros.h"
@@ skipping 10 matching lines @@
  public:
   DEVICE_VR_EXPORT ~VRServiceImpl() override;
 
   DEVICE_VR_EXPORT static void BindRequest(
       mojo::InterfaceRequest<mojom::VRService> request);
 
   mojom::VRServiceClient* client() { return client_.get(); }
 
   VRDisplayImpl* GetVRDisplayImpl(VRDevice* device);
 
+  bool listening_for_activate() { return listening_for_activate_; }
+
  private:
   friend class VRServiceTestBinding;
   friend class VRDeviceManagerTest;
   friend class VRDisplayImpl;
 
   DEVICE_VR_EXPORT VRServiceImpl();
 
   // Mojo connection handling.
   DEVICE_VR_EXPORT void Bind(mojo::InterfaceRequest<mojom::VRService> request);
   void RemoveFromDeviceManager();
   void RemoveDevice(VRDevice* device);
 
   // mojom::VRService implementation
   void SetClient(mojom::VRServiceClientPtr service_client,
                  const SetClientCallback& callback) override;
+  void SetListeningForActivate(bool listening) override;
 
   using DisplayImplMap = std::map<VRDevice*, std::unique_ptr<VRDisplayImpl>>;
   DisplayImplMap displays_;
 
   mojom::VRServiceClientPtr client_;
 
+  bool listening_for_activate_;
+
   std::unique_ptr<mojo::Binding<mojom::VRService>> binding_;
 
   DISALLOW_COPY_AND_ASSIGN(VRServiceImpl);
 };
 
 }  // namespace device
 
 #endif  // DEVICE_VR_VR_SERVICE_IMPL_H