Fixes 2D-to-WebVR site transitions when browsing in VR.

device/vr/vr_display_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_DISPLAY_IMPL_H
 #define DEVICE_VR_VR_DISPLAY_IMPL_H
 
 #include <memory>
 
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "device/vr/vr_device.h"
 #include "device/vr/vr_export.h"
 #include "device/vr/vr_service.mojom.h"
 #include "mojo/public/cpp/bindings/binding.h"
 
 namespace device {
 
 class VRServiceImpl;
 
+// Browser process representation of a VRDevice within a WebVR site session
+// (see VRServiceImpl). VRDisplayImpl receives/sends VR device events
+// from/to mojom::VRDisplayClient (the render process representation of a VR
+// device).
+// VRDisplayImpl objects are owned by their respective VRServiceImpl instances.
 class VRDisplayImpl : public mojom::VRDisplay {
  public:
-  VRDisplayImpl(device::VRDevice* device, VRServiceImpl* service);
+  VRDisplayImpl(device::VRDevice* device,
+                VRServiceImpl* service,
+                mojom::VRServiceClient* service_client,
+                mojom::VRDisplayInfoPtr display_info);
   ~VRDisplayImpl() override;
 
-  mojom::VRDisplayClient* client() { return client_.get(); }
+  virtual void OnChanged(mojom::VRDisplayInfoPtr vr_device_info);
+  virtual void OnExitPresent();
+  virtual void OnBlur();
+  virtual void OnFocus();
+  virtual void OnActivate(mojom::VRDisplayEventReason reason);
+  virtual void OnDeactivate(mojom::VRDisplayEventReason reason);
 
  private:
   friend class VRDisplayImplTest;
   friend class VRServiceImpl;
 
   void ResetPose() override;
 
   void RequestPresent(bool secure_origin,
                       const RequestPresentCallback& callback) override;
   void ExitPresent() override;
   void SubmitFrame(mojom::VRPosePtr pose) override;
 
   void UpdateLayerBounds(int16_t frame_index,
                          mojom::VRLayerBoundsPtr left_bounds,
                          mojom::VRLayerBoundsPtr right_bounds) override;
   void GetVRVSyncProvider(mojom::VRVSyncProviderRequest request) override;
 
   void RequestPresentResult(const RequestPresentCallback& callback,
                             bool secure_origin,
                             bool success);
 
-  void OnVRDisplayInfoCreated(mojom::VRDisplayInfoPtr display_info);
-
   mojo::Binding<mojom::VRDisplay> binding_;
   mojom::VRDisplayClientPtr client_;
   device::VRDevice* device_;
   VRServiceImpl* service_;
 
   base::WeakPtrFactory<VRDisplayImpl> weak_ptr_factory_;
 };
 
 }  // namespace device
 
 #endif  //  DEVICE_VR_VR_DISPLAY_IMPL_H