Implement WebVR presentation pausing for VR Shell Menu Mode

device/vr/vr_device.h

 // Copyright 2015 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_DEVICE_H
 #define DEVICE_VR_VR_DEVICE_H
 
 #include "base/macros.h"
 #include "device/vr/vr_export.h"
 #include "device/vr/vr_service.mojom.h"
 
 namespace blink {
 struct WebHMDSensorState;
 }
 
 namespace ui {
 class BaseWindow;
 }
 
 namespace device {
 
 class VRDeviceProvider;
 class VRDisplayImpl;
 class VRServiceImpl;
 
 const unsigned int VR_DEVICE_LAST_ID = 0xFFFFFFFF;
 
 class DEVICE_VR_EXPORT VRDevice {
  public:
-  explicit VRDevice(VRDeviceProvider* provider);
+  explicit VRDevice(scoped_refptr<VRDeviceProvider> provider);
   virtual ~VRDevice();
 
-  VRDeviceProvider* provider() const { return provider_; }
+  scoped_refptr<VRDeviceProvider> provider() const;
   unsigned int id() const { return id_; }
 
   virtual mojom::VRDisplayInfoPtr GetVRDevice() = 0;
   virtual mojom::VRPosePtr GetPose(VRServiceImpl* service) = 0;
   virtual void ResetPose(VRServiceImpl* service) = 0;
 
   virtual bool RequestPresent(VRServiceImpl* service, bool secure_origin) = 0;
   virtual void ExitPresent(VRServiceImpl* service) = 0;
   virtual void SubmitFrame(VRServiceImpl* service, mojom::VRPosePtr pose) = 0;
   virtual void UpdateLayerBounds(VRServiceImpl* service,
                                  mojom::VRLayerBoundsPtr leftBounds,
                                  mojom::VRLayerBoundsPtr rightBounds) = 0;
 
   virtual void AddService(VRServiceImpl* service);
   virtual void RemoveService(VRServiceImpl* service);
 
   // TODO(shaobo.yan@intel.com): Checks should be done against VRDisplayImpl and
   // the name should be considered.
   virtual bool IsAccessAllowed(VRServiceImpl* service);
   virtual bool IsPresentingService(VRServiceImpl* service);
 
   virtual void OnDisplayChanged();
   virtual void OnExitPresent(VRServiceImpl* service);
+  virtual void OnDisplayBlur();
+  virtual void OnDisplayFocus();
 
  protected:
   // Each Service have one VRDisplay with one VRDevice.
   // TODO(shaobo.yan@intel.com): Since the VRDisplayImpl knows its VRServiceImpl
   // we should
   // only need to store the VRDisplayImpl.
   using DisplayClientMap = std::map<VRServiceImpl*, VRDisplayImpl*>;
   DisplayClientMap displays_;
 
   // TODO(shaobo.yan@intel.com): Should track presenting VRDisplayImpl instead.
   VRServiceImpl* presenting_service_;
 
  private:
-  VRDeviceProvider* provider_;
+  scoped_refptr<VRDeviceProvider> provider_;
   unsigned int id_;
 
   static unsigned int next_id_;
 
   DISALLOW_COPY_AND_ASSIGN(VRDevice);
 };
 
 }  // namespace device
 
 #endif  // DEVICE_VR_VR_DEVICE_H