Query LUID from OpenXR runtime and send back to browser process

When initializing the OpenXR runtime, send the LUID of the GPU adapter
the VR headset is plugged into back to the browser process. This change
is one part of a series of changes to add multi-GPU support for VR.
crrev.com/c/2216166 added the LUID of the GPU that the GPU process is
using. A subsequent CL will compare these two LUIDs to determine
whether the GPU process needs to be restarted and initialized on the
correct GPU to be XR compatible.

This change adds a XRDeviceData struct that wraps around a LUID so
that the LUID is only enabled on Windows with minimal
"#if defined(OS_WIN)" wrappers. A subsequent change specified by
crbug.com/1090029 will consolidate all information about an XR device
into this XRDeviceData struct.

Bug: 792657
Change-Id: If38fd6d0b16c39b36d529d4aaa02c22fe0bcff0a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2225366
Commit-Queue: Patrick To <patrto@microsoft.com>
Reviewed-by: Kenneth Russell <kbr@chromium.org>
Reviewed-by: Alexander Cooper <alcooper@chromium.org>
Reviewed-by: Alex Gough <ajgo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#776324}

chrome/browser/android/vr/arcore_device/arcore_device_provider.cc

@@ -16,6 +16,7 @@ ArCoreDeviceProvider::~ArCoreDeviceProvider() = default;
 void ArCoreDeviceProvider::Initialize(
     base::RepeatingCallback<void(mojom::XRDeviceId,
                                  mojom::VRDisplayInfoPtr,
+                                 mojom::XRDeviceDataPtr,
                                  mojo::PendingRemote<mojom::XRRuntime>)>
         add_device_callback,
     base::RepeatingCallback<void(mojom::XRDeviceId)> remove_device_callback,
@@ -24,9 +25,9 @@ void ArCoreDeviceProvider::Initialize(
     DVLOG(2) << __func__ << ": ARCore is supported, creating device";
     arcore_device_ = std::make_unique<ArCoreDevice>();
 
-    add_device_callback.Run(arcore_device_->GetId(),
-                            arcore_device_->GetVRDisplayInfo(),
-                            arcore_device_->BindXRRuntime());
+    add_device_callback.Run(
+        arcore_device_->GetId(), arcore_device_->GetVRDisplayInfo(),
+        arcore_device_->GetDeviceData(), arcore_device_->BindXRRuntime());
   }
   initialized_ = true;
   std::move(initialization_complete).Run();

chrome/browser/android/vr/arcore_device/arcore_device_provider.h

@@ -22,6 +22,7 @@ class ArCoreDeviceProvider : public VRDeviceProvider {
   void Initialize(
       base::RepeatingCallback<void(mojom::XRDeviceId,
                                    mojom::VRDisplayInfoPtr,
+                                   mojom::XRDeviceDataPtr,
                                    mojo::PendingRemote<mojom::XRRuntime>)>
           add_device_callback,
       base::RepeatingCallback<void(mojom::XRDeviceId)> remove_device_callback,

content/browser/xr/service/browser_xr_runtime_impl.cc

@@ -213,9 +213,11 @@ bool ContainsFeature(
 
 BrowserXRRuntimeImpl::BrowserXRRuntimeImpl(
     device::mojom::XRDeviceId id,
+    device::mojom::XRDeviceDataPtr device_data,
     mojo::PendingRemote<device::mojom::XRRuntime> runtime,
     device::mojom::VRDisplayInfoPtr display_info)
     : id_(id),
+      device_data_(std::move(device_data)),
       runtime_(std::move(runtime)),
       display_info_(ValidateVRDisplayInfo(display_info.get(), id)) {
   DVLOG(2) << __func__ << ": id=" << id;
@@ -558,4 +560,10 @@ void BrowserXRRuntimeImpl::BeforeRuntimeRemoved() {
   StopImmersiveSession(base::DoNothing());
 }
 
+#if defined(OS_WIN)
+base::Optional<LUID> BrowserXRRuntimeImpl::GetLuid() const {
+  return device_data_->luid;
+}
+#endif
+
 }  // namespace content

content/browser/xr/service/browser_xr_runtime_impl.h

@@ -10,6 +10,7 @@
 
 #include "base/observer_list.h"
 #include "base/observer_list_types.h"
+#include "build/build_config.h"
 #include "content/browser/xr/service/vr_service_impl.h"
 #include "content/public/browser/browser_xr_runtime.h"
 #include "content/public/browser/render_frame_host.h"
@@ -35,6 +36,7 @@ class BrowserXRRuntimeImpl : public content::BrowserXRRuntime,
       base::OnceCallback<void(device::mojom::XRSessionPtr)>;
   explicit BrowserXRRuntimeImpl(
       device::mojom::XRDeviceId id,
+      device::mojom::XRDeviceDataPtr device_data,
       mojo::PendingRemote<device::mojom::XRRuntime> runtime,
       device::mojom::VRDisplayInfoPtr info);
   ~BrowserXRRuntimeImpl() override;
@@ -71,6 +73,10 @@ class BrowserXRRuntimeImpl : public content::BrowserXRRuntime,
 
   device::mojom::XRDeviceId GetId() const { return id_; }
 
+#if defined(OS_WIN)
+  base::Optional<LUID> GetLuid() const;
+#endif
+
   // BrowserXRRuntime
   void AddObserver(Observer* observer) override;
   void RemoveObserver(Observer* observer) override;
@@ -100,6 +106,7 @@ class BrowserXRRuntimeImpl : public content::BrowserXRRuntime,
   void OnInstallFinished(bool succeeded);
 
   device::mojom::XRDeviceId id_;
+  device::mojom::XRDeviceDataPtr device_data_;
   mojo::Remote<device::mojom::XRRuntime> runtime_;
   mojo::Remote<device::mojom::XRSessionController>
       immersive_session_controller_;

content/browser/xr/service/isolated_device_provider.cc

@@ -18,6 +18,7 @@ namespace content {
 void IsolatedVRDeviceProvider::Initialize(
     base::RepeatingCallback<void(device::mojom::XRDeviceId,
                                  device::mojom::VRDisplayInfoPtr,
+                                 device::mojom::XRDeviceDataPtr,
                                  mojo::PendingRemote<device::mojom::XRRuntime>)>
         add_device_callback,
     base::RepeatingCallback<void(device::mojom::XRDeviceId)>
@@ -37,8 +38,10 @@ bool IsolatedVRDeviceProvider::Initialized() {
 void IsolatedVRDeviceProvider::OnDeviceAdded(
     mojo::PendingRemote<device::mojom::XRRuntime> device,
     mojo::PendingRemote<device::mojom::XRCompositorHost> compositor_host,
+    device::mojom::XRDeviceDataPtr device_data,
     device::mojom::XRDeviceId device_id) {
-  add_device_callback_.Run(device_id, nullptr, std::move(device));
+  add_device_callback_.Run(device_id, nullptr, std::move(device_data),
+                           std::move(device));
 
   auto* integration_client = GetXrIntegrationClient();
   if (!integration_client)

content/browser/xr/service/isolated_device_provider.h

@@ -30,6 +30,7 @@ class IsolatedVRDeviceProvider
       base::RepeatingCallback<void(
           device::mojom::XRDeviceId,
           device::mojom::VRDisplayInfoPtr,
+          device::mojom::XRDeviceDataPtr,
           mojo::PendingRemote<device::mojom::XRRuntime>)> add_device_callback,
       base::RepeatingCallback<void(device::mojom::XRDeviceId)>
           remove_device_callback,
@@ -43,6 +44,7 @@ class IsolatedVRDeviceProvider
   void OnDeviceAdded(
       mojo::PendingRemote<device::mojom::XRRuntime> device,
       mojo::PendingRemote<device::mojom::XRCompositorHost> compositor_host,
+      device::mojom::XRDeviceDataPtr device_data,
       device::mojom::XRDeviceId device_id) override;
   void OnDeviceRemoved(device::mojom::XRDeviceId id) override;
   void OnDevicesEnumerated() override;
@@ -53,8 +55,10 @@ class IsolatedVRDeviceProvider
   int retry_count_ = 0;
   mojo::Remote<device::mojom::IsolatedXRRuntimeProvider> device_provider_;
 
+  // TODO(crbug.com/1090029): Wrap XRDeviceId + VRDisplayInfo into XRDeviceData
   base::RepeatingCallback<void(device::mojom::XRDeviceId,
                                device::mojom::VRDisplayInfoPtr,
+                               device::mojom::XRDeviceDataPtr,
                                mojo::PendingRemote<device::mojom::XRRuntime>)>
       add_device_callback_;
   base::RepeatingCallback<void(device::mojom::XRDeviceId)>

content/browser/xr/service/xr_runtime_manager_impl.cc

@@ -392,14 +392,15 @@ bool XRRuntimeManagerImpl::AreAllProvidersInitialized() {
 void XRRuntimeManagerImpl::AddRuntime(
     device::mojom::XRDeviceId id,
     device::mojom::VRDisplayInfoPtr info,
+    device::mojom::XRDeviceDataPtr device_data,
     mojo::PendingRemote<device::mojom::XRRuntime> runtime) {
   DCHECK_CALLED_ON_VALID_THREAD(thread_checker_);
   DCHECK(runtimes_.find(id) == runtimes_.end());
 
   TRACE_EVENT_INSTANT1("xr", "AddRuntime", TRACE_EVENT_SCOPE_THREAD, "id", id);
 
-  runtimes_[id] = std::make_unique<BrowserXRRuntimeImpl>(id, std::move(runtime),
-                                                         std::move(info));
+  runtimes_[id] = std::make_unique<BrowserXRRuntimeImpl>(
+      id, std::move(device_data), std::move(runtime), std::move(info));
 
   for (Observer& obs : g_xr_runtime_manager_observers.Get())
     obs.OnRuntimeAdded(runtimes_[id].get());

content/browser/xr/service/xr_runtime_manager_impl.h

@@ -101,6 +101,7 @@ class CONTENT_EXPORT XRRuntimeManagerImpl
 
   void AddRuntime(device::mojom::XRDeviceId id,
                   device::mojom::VRDisplayInfoPtr info,
+                  device::mojom::XRDeviceDataPtr device_data,
                   mojo::PendingRemote<device::mojom::XRRuntime> runtime);
   void RemoveRuntime(device::mojom::XRDeviceId id);
 

content/services/isolated_xr_device/xr_runtime_provider.cc

@@ -40,16 +40,22 @@ namespace {
 constexpr base::TimeDelta kTimeBetweenPollingEvents =
     base::TimeDelta::FromSecondsD(5);
 
+template <typename VrDeviceT>
+std::unique_ptr<VrDeviceT> CreateDevice() {
+  return std::make_unique<VrDeviceT>();
+}
+
 template <typename VrDeviceT>
 std::unique_ptr<VrDeviceT> EnableRuntime(
-    device::mojom::IsolatedXRRuntimeProviderClient* client) {
-  auto device = std::make_unique<VrDeviceT>();
+    device::mojom::IsolatedXRRuntimeProviderClient* client,
+    base::OnceCallback<std::unique_ptr<VrDeviceT>()> create_device) {
+  auto device = std::move(create_device).Run();
   TRACE_EVENT_INSTANT1("xr", "HardwareAdded", TRACE_EVENT_SCOPE_THREAD, "id",
                        static_cast<int>(device->GetId()));
   // "Device" here refers to a runtime + hardware pair, not necessarily
   // a physical device.
   client->OnDeviceAdded(device->BindXRRuntime(), device->BindCompositorHost(),
-                        device->GetId());
+                        device->GetDeviceData(), device->GetId());
   return device;
 }
 
@@ -64,12 +70,14 @@ void DisableRuntime(device::mojom::IsolatedXRRuntimeProviderClient* client,
 }
 
 template <typename VrHardwareT>
-void SetRuntimeStatus(device::mojom::IsolatedXRRuntimeProviderClient* client,
-                      IsolatedXRRuntimeProvider::RuntimeStatus status,
-                      std::unique_ptr<VrHardwareT>* out_device) {
+void SetRuntimeStatus(
+    device::mojom::IsolatedXRRuntimeProviderClient* client,
+    IsolatedXRRuntimeProvider::RuntimeStatus status,
+    base::OnceCallback<std::unique_ptr<VrHardwareT>()> create_device,
+    std::unique_ptr<VrHardwareT>* out_device) {
   if (status == IsolatedXRRuntimeProvider::RuntimeStatus::kEnable &&
       !*out_device) {
-    *out_device = EnableRuntime<VrHardwareT>(client);
+    *out_device = EnableRuntime<VrHardwareT>(client, std::move(create_device));
   } else if (status == IsolatedXRRuntimeProvider::RuntimeStatus::kDisable &&
              *out_device) {
     DisableRuntime(client, std::move(*out_device));
@@ -211,7 +219,9 @@ bool IsolatedXRRuntimeProvider::IsOculusVrHardwareAvailable() {
 }
 
 void IsolatedXRRuntimeProvider::SetOculusVrRuntimeStatus(RuntimeStatus status) {
-  SetRuntimeStatus(client_.get(), status, &oculus_device_);
+  SetRuntimeStatus(client_.get(), status,
+                   base::BindOnce(&CreateDevice<device::OculusDevice>),
+                   &oculus_device_);
 }
 #endif  // BUILDFLAG(ENABLE_OCULUS_VR)
 
@@ -223,7 +233,9 @@ bool IsolatedXRRuntimeProvider::IsOpenVrHardwareAvailable() {
 }
 
 void IsolatedXRRuntimeProvider::SetOpenVrRuntimeStatus(RuntimeStatus status) {
-  SetRuntimeStatus(client_.get(), status, &openvr_device_);
+  SetRuntimeStatus(client_.get(), status,
+                   base::BindOnce(&CreateDevice<device::OpenVRDevice>),
+                   &openvr_device_);
 }
 #endif  // BUILDFLAG(ENABLE_OPENVR)
 
@@ -233,7 +245,9 @@ bool IsolatedXRRuntimeProvider::IsWMRHardwareAvailable() {
 }
 
 void IsolatedXRRuntimeProvider::SetWMRRuntimeStatus(RuntimeStatus status) {
-  SetRuntimeStatus(client_.get(), status, &wmr_device_);
+  SetRuntimeStatus(client_.get(), status,
+                   base::BindOnce(&CreateDevice<device::MixedRealityDevice>),
+                   &wmr_device_);
 }
 #endif  // BUILDFLAG(ENABLE_WINDOWS_MR)
 
@@ -243,7 +257,17 @@ bool IsolatedXRRuntimeProvider::IsOpenXrHardwareAvailable() {
 }
 
 void IsolatedXRRuntimeProvider::SetOpenXrRuntimeStatus(RuntimeStatus status) {
-  SetRuntimeStatus(client_.get(), status, &openxr_device_);
+  SetRuntimeStatus(
+      client_.get(), status,
+      base::BindOnce(
+          [](device::OpenXrStatics* openxr_statics) {
+            // This does not give any ownership of the OpenXrStatics object to
+            // OpenXrDevice. The OpenXrStatics is only used in the constructor
+            // and a reference is not kept.
+            return std::make_unique<device::OpenXrDevice>(openxr_statics);
+          },
+          openxr_statics_.get()),
+      &openxr_device_);
 }
 #endif  // BUILDFLAG(ENABLE_OPENXR)
 

device/vr/android/gvr/gvr_device_provider.cc

@@ -17,6 +17,7 @@ GvrDeviceProvider::~GvrDeviceProvider() = default;
 void GvrDeviceProvider::Initialize(
     base::RepeatingCallback<void(mojom::XRDeviceId,
                                  mojom::VRDisplayInfoPtr,
+                                 mojom::XRDeviceDataPtr,
                                  mojo::PendingRemote<mojom::XRRuntime>)>
         add_device_callback,
     base::RepeatingCallback<void(mojom::XRDeviceId)> remove_device_callback,
@@ -32,6 +33,7 @@ void GvrDeviceProvider::Initialize(
   }
   if (vr_device_) {
     add_device_callback.Run(vr_device_->GetId(), vr_device_->GetVRDisplayInfo(),
+                            vr_device_->GetDeviceData(),
                             vr_device_->BindXRRuntime());
   }
   initialized_ = true;

device/vr/android/gvr/gvr_device_provider.h

@@ -24,6 +24,7 @@ class DEVICE_VR_EXPORT GvrDeviceProvider : public VRDeviceProvider {
   void Initialize(
       base::RepeatingCallback<void(mojom::XRDeviceId,
                                    mojom::VRDisplayInfoPtr,
+                                   mojom::XRDeviceDataPtr,
                                    mojo::PendingRemote<mojom::XRRuntime>)>
           add_device_callback,
       base::RepeatingCallback<void(mojom::XRDeviceId)> remove_device_callback,

device/vr/openxr/openxr_device.cc

@@ -7,8 +7,10 @@
 #include <string>
 
 #include "base/bind_helpers.h"
+#include "build/build_config.h"
 #include "device/vr/openxr/openxr_api_wrapper.h"
 #include "device/vr/openxr/openxr_render_loop.h"
+#include "device/vr/openxr/openxr_statics.h"
 #include "device/vr/util/transform_utils.h"
 #include "mojo/public/cpp/bindings/pending_remote.h"
 
@@ -53,10 +55,17 @@ mojom::VRDisplayInfoPtr CreateFakeVRDisplayInfo(device::mojom::XRDeviceId id) {
 
 }  // namespace
 
-OpenXrDevice::OpenXrDevice()
+// OpenXrDevice must not take ownership of the OpenXrStatics passed in.
+// The OpenXrStatics object is owned by IsolatedXRRuntimeProvider.
+OpenXrDevice::OpenXrDevice(OpenXrStatics* openxr_statics)
     : VRDeviceBase(device::mojom::XRDeviceId::OPENXR_DEVICE_ID),
       weak_ptr_factory_(this) {
-  SetVRDisplayInfo(CreateFakeVRDisplayInfo(GetId()));
+  mojom::VRDisplayInfoPtr display_info = CreateFakeVRDisplayInfo(GetId());
+  SetVRDisplayInfo(std::move(display_info));
+
+#if defined(OS_WIN)
+  SetLuid(openxr_statics->GetLuid());
+#endif
 }
 
 OpenXrDevice::~OpenXrDevice() {

device/vr/openxr/openxr_device.h

@@ -18,13 +18,14 @@
 namespace device {
 
 class OpenXrRenderLoop;
+class OpenXrStatics;
 
 class DEVICE_VR_EXPORT OpenXrDevice
     : public VRDeviceBase,
       public mojom::XRSessionController,
       public mojom::XRCompositorHost {
  public:
-  OpenXrDevice();
+  OpenXrDevice(OpenXrStatics* openxr_statics);
   ~OpenXrDevice() override;
 
   // VRDeviceBase

device/vr/openxr/openxr_statics.cc

@@ -31,4 +31,25 @@ bool OpenXrStatics::IsApiAvailable() {
          XR_SUCCEEDED(CreateInstance(&instance_));
 }
 
-}  // namespace device
+#if defined(OS_WIN)
+// Returns the LUID of the adapter the OpenXR runtime is on. Returns {0, 0} if
+// the LUID could not be determined.
+LUID OpenXrStatics::GetLuid() {
+  if (!IsApiAvailable())
+    return {0, 0};
+
+  XrSystemId system;
+  if (XR_FAILED(GetSystem(instance_, &system)))
+    return {0, 0};
+
+  XrGraphicsRequirementsD3D11KHR graphics_requirements = {
+      XR_TYPE_GRAPHICS_REQUIREMENTS_D3D11_KHR};
+  if (XR_FAILED(xrGetD3D11GraphicsRequirementsKHR(instance_, system,
+                                                  &graphics_requirements)))
+    return {0, 0};
+
+  return graphics_requirements.adapterLuid;
+}
+#endif
+
+}  // namespace device

device/vr/openxr/openxr_statics.h

@@ -8,6 +8,7 @@
 #include <d3d11.h>
 #include <memory>
 
+#include "build/build_config.h"
 #include "device/vr/vr_export.h"
 #include "third_party/openxr/src/include/openxr/openxr.h"
 #include "third_party/openxr/src/include/openxr/openxr_platform.h"
@@ -22,10 +23,14 @@ class DEVICE_VR_EXPORT OpenXrStatics {
   bool IsHardwareAvailable();
   bool IsApiAvailable();
 
+#if defined(OS_WIN)
+  LUID GetLuid();
+#endif
+
  private:
   XrInstance instance_;
 };
 
 }  // namespace device
 
-#endif  // DEVICE_VR_WINDOWS_MIXED_REALITY_MIXED_REALITY_STATICS_H_
+#endif  // DEVICE_VR_WINDOWS_MIXED_REALITY_MIXED_REALITY_STATICS_H_

device/vr/orientation/orientation_device_provider.cc

@@ -22,13 +22,14 @@ VROrientationDeviceProvider::~VROrientationDeviceProvider() = default;
 void VROrientationDeviceProvider::Initialize(
     base::RepeatingCallback<void(mojom::XRDeviceId,
                                  mojom::VRDisplayInfoPtr,
+                                 mojom::XRDeviceDataPtr,
                                  mojo::PendingRemote<mojom::XRRuntime>)>
         add_device_callback,
     base::RepeatingCallback<void(mojom::XRDeviceId)> remove_device_callback,
     base::OnceClosure initialization_complete) {
   if (device_ && device_->IsAvailable()) {
     add_device_callback.Run(device_->GetId(), device_->GetVRDisplayInfo(),
-                            device_->BindXRRuntime());
+                            device_->GetDeviceData(), device_->BindXRRuntime());
     return;
   }
 
@@ -55,6 +56,7 @@ void VROrientationDeviceProvider::DeviceInitialized() {
   // If the device successfully connected to the orientation APIs, provide it.
   if (device_->IsAvailable()) {
     add_device_callback_.Run(device_->GetId(), device_->GetVRDisplayInfo(),
+                             device_->GetDeviceData(),
                              device_->BindXRRuntime());
   }
 

device/vr/orientation/orientation_device_provider.h

@@ -28,6 +28,7 @@ class COMPONENT_EXPORT(VR_ORIENTATION) VROrientationDeviceProvider
   void Initialize(
       base::RepeatingCallback<void(mojom::XRDeviceId,
                                    mojom::VRDisplayInfoPtr,
+                                   mojom::XRDeviceDataPtr,
                                    mojo::PendingRemote<mojom::XRRuntime>)>
           add_device_callback,
       base::RepeatingCallback<void(mojom::XRDeviceId)> remove_device_callback,
@@ -46,6 +47,7 @@ class COMPONENT_EXPORT(VR_ORIENTATION) VROrientationDeviceProvider
 
   base::RepeatingCallback<void(mojom::XRDeviceId,
                                mojom::VRDisplayInfoPtr,
+                               mojom::XRDeviceDataPtr,
                                mojo::PendingRemote<mojom::XRRuntime>)>
       add_device_callback_;
   base::OnceClosure initialized_callback_;

device/vr/orientation/orientation_device_provider_unittest.cc

@@ -84,10 +84,12 @@ class VROrientationDeviceProviderTest : public testing::Test {
 
   base::RepeatingCallback<void(device::mojom::XRDeviceId,
                                mojom::VRDisplayInfoPtr,
+                               mojom::XRDeviceDataPtr,
                                mojo::PendingRemote<mojom::XRRuntime> device)>
   DeviceAndIdCallbackFailIfCalled() {
     return base::BindRepeating(
         [](device::mojom::XRDeviceId id, mojom::VRDisplayInfoPtr,
+           mojom::XRDeviceDataPtr,
            mojo::PendingRemote<mojom::XRRuntime> device) { FAIL(); });
   }
 
@@ -98,14 +100,16 @@ class VROrientationDeviceProviderTest : public testing::Test {
 
   base::RepeatingCallback<void(device::mojom::XRDeviceId,
                                mojom::VRDisplayInfoPtr,
+                               mojom::XRDeviceDataPtr,
                                mojo::PendingRemote<mojom::XRRuntime> device)>
   DeviceAndIdCallbackMustBeCalled(base::RunLoop* loop) {
     return base::BindRepeating(
         [](base::OnceClosure quit_closure, device::mojom::XRDeviceId id,
-           mojom::VRDisplayInfoPtr info,
+           mojom::VRDisplayInfoPtr info, mojom::XRDeviceDataPtr data,
            mojo::PendingRemote<mojom::XRRuntime> device) {
           ASSERT_TRUE(device);
           ASSERT_TRUE(info);
+          ASSERT_TRUE(data);
           std::move(quit_closure).Run();
         },
         loop->QuitClosure());

device/vr/public/cpp/vr_device_provider.h

@@ -23,6 +23,7 @@ class COMPONENT_EXPORT(VR_PUBLIC_CPP) VRDeviceProvider {
   virtual void Initialize(
       base::RepeatingCallback<void(mojom::XRDeviceId id,
                                    mojom::VRDisplayInfoPtr,
+                                   mojom::XRDeviceDataPtr,
                                    mojo::PendingRemote<mojom::XRRuntime>)>
           add_device_callback,
       base::RepeatingCallback<void(mojom::XRDeviceId id)>

device/vr/public/mojom/isolated_xr_service.mojom

@@ -6,6 +6,8 @@ module device.mojom;
 
 import "device/vr/public/mojom/browser_test_interfaces.mojom";
 import "device/vr/public/mojom/vr_service.mojom";
+[EnableIf=is_win]
+import "gpu/ipc/common/luid.mojom";
 import "mojo/public/mojom/base/time.mojom";
 import "ui/gfx/geometry/mojom/geometry.mojom";
 
@@ -110,6 +112,15 @@ interface XRCompositorHost {
   CreateImmersiveOverlay(pending_receiver<ImmersiveOverlay> overlay);
 };
 
+// Information about a particular XR device that is available. All information
+// about an available XR device should be wrapped in this struct.
+// TODO(crbug.com/1090029): Wrap XRDeviceId + VRDisplayInfo in this struct
+struct XRDeviceData {
+  [EnableIf=is_win]
+  // The LUID of the GPU that the device is plugged into.
+  gpu.mojom.Luid? luid;
+};
+
 // Notify the browser process about a set of runtimes.  The browser process
 // implements this interface to be notified about runtime changes from the XR
 // device service.
@@ -118,6 +129,7 @@ interface IsolatedXRRuntimeProviderClient {
   // attached and become available.
   OnDeviceAdded(pending_remote<XRRuntime> runtime,
       pending_remote<XRCompositorHost> compositor_host,
+      XRDeviceData device_data,
       device.mojom.XRDeviceId device_id);
 
   // Called when runtimes become unavailable - for example if the hardware is

device/vr/test/fake_vr_device_provider.cc

@@ -17,9 +17,9 @@ void FakeVRDeviceProvider::AddDevice(std::unique_ptr<VRDeviceBase> device) {
   VRDeviceBase* device_base = static_cast<VRDeviceBase*>(device.get());
   devices_.push_back(std::move(device));
   if (initialized_)
-    add_device_callback_.Run(device_base->GetId(),
-                             device_base->GetVRDisplayInfo(),
-                             device_base->BindXRRuntime());
+    add_device_callback_.Run(
+        device_base->GetId(), device_base->GetVRDisplayInfo(),
+        device_base->GetDeviceData(), device_base->BindXRRuntime());
 }
 
 void FakeVRDeviceProvider::RemoveDevice(mojom::XRDeviceId device_id) {
@@ -36,6 +36,7 @@ void FakeVRDeviceProvider::RemoveDevice(mojom::XRDeviceId device_id) {
 void FakeVRDeviceProvider::Initialize(
     base::RepeatingCallback<void(mojom::XRDeviceId,
                                  mojom::VRDisplayInfoPtr,
+                                 mojom::XRDeviceDataPtr,
                                  mojo::PendingRemote<mojom::XRRuntime>)>
         add_device_callback,
     base::RepeatingCallback<void(mojom::XRDeviceId)> remove_device_callback,
@@ -45,9 +46,9 @@ void FakeVRDeviceProvider::Initialize(
 
   for (std::unique_ptr<VRDeviceBase>& device : devices_) {
     auto* device_base = static_cast<VRDeviceBase*>(device.get());
-    add_device_callback_.Run(device_base->GetId(),
-                             device_base->GetVRDisplayInfo(),
-                             device_base->BindXRRuntime());
+    add_device_callback_.Run(
+        device_base->GetId(), device_base->GetVRDisplayInfo(),
+        device_base->GetDeviceData(), device_base->BindXRRuntime());
   }
   initialized_ = true;
   std::move(initialization_complete).Run();

device/vr/test/fake_vr_device_provider.h

@@ -28,6 +28,7 @@ class DEVICE_VR_EXPORT FakeVRDeviceProvider : public VRDeviceProvider {
   void Initialize(
       base::RepeatingCallback<void(mojom::XRDeviceId,
                                    mojom::VRDisplayInfoPtr,
+                                   mojom::XRDeviceDataPtr,
                                    mojo::PendingRemote<mojom::XRRuntime>)>
           add_device_callback,
       base::RepeatingCallback<void(mojom::XRDeviceId)> remove_device_callback,
@@ -39,6 +40,7 @@ class DEVICE_VR_EXPORT FakeVRDeviceProvider : public VRDeviceProvider {
   bool initialized_;
   base::RepeatingCallback<void(mojom::XRDeviceId,
                                mojom::VRDisplayInfoPtr,
+                               mojom::XRDeviceDataPtr,
                                mojo::PendingRemote<mojom::XRRuntime>)>
       add_device_callback_;
   base::RepeatingCallback<void(mojom::XRDeviceId)> remove_device_callback_;

device/vr/vr_device_base.cc

@@ -19,6 +19,10 @@ mojom::XRDeviceId VRDeviceBase::GetId() const {
   return id_;
 }
 
+mojom::XRDeviceDataPtr VRDeviceBase::GetDeviceData() const {
+  return device_data_.Clone();
+}
+
 void VRDeviceBase::PauseTracking() {}
 
 void VRDeviceBase::ResumeTracking() {}
@@ -75,6 +79,15 @@ void VRDeviceBase::OnVisibilityStateChanged(
     listener_->OnVisibilityStateChanged(visibility_state);
 }
 
+#if defined(OS_WIN)
+void VRDeviceBase::SetLuid(const LUID& luid) {
+  if (luid.HighPart != 0 || luid.LowPart != 0) {
+    // Only set the LUID if it exists and is nonzero.
+    device_data_.luid = base::make_optional<LUID>(luid);
+  }
+}
+#endif
+
 mojo::PendingRemote<mojom::XRRuntime> VRDeviceBase::BindXRRuntime() {
   DVLOG(2) << __func__;
   return runtime_receiver_.BindNewPipeAndPassRemote();

device/vr/vr_device_base.h

@@ -11,6 +11,7 @@
 #include "base/callback.h"
 #include "base/component_export.h"
 #include "base/macros.h"
+#include "build/build_config.h"
 #include "device/vr/public/mojom/vr_service.mojom.h"
 #include "device/vr/vr_device.h"
 #include "mojo/public/cpp/bindings/associated_remote.h"
@@ -35,6 +36,7 @@ class COMPONENT_EXPORT(DEVICE_VR_BASE) VRDeviceBase : public mojom::XRRuntime {
   void ShutdownSession(mojom::XRRuntime::ShutdownSessionCallback) override;
 
   device::mojom::XRDeviceId GetId() const;
+  device::mojom::XRDeviceDataPtr GetDeviceData() const;
 
   bool HasExclusiveSession();
 
@@ -61,6 +63,9 @@ class COMPONENT_EXPORT(DEVICE_VR_BASE) VRDeviceBase : public mojom::XRRuntime {
   bool IsPresenting() { return presenting_; }  // Exposed for test.
   void SetVRDisplayInfo(mojom::VRDisplayInfoPtr display_info);
   void OnVisibilityStateChanged(mojom::XRVisibilityState visibility_state);
+#if defined(OS_WIN)
+  void SetLuid(const LUID& luid);
+#endif
 
   mojom::VRDisplayInfoPtr display_info_;
 
@@ -73,6 +78,8 @@ class COMPONENT_EXPORT(DEVICE_VR_BASE) VRDeviceBase : public mojom::XRRuntime {
 
   device::mojom::XRDeviceId id_;
 
+  device::mojom::XRDeviceData device_data_;
+
   mojo::Receiver<mojom::XRRuntime> runtime_receiver_{this};
 
   DISALLOW_COPY_AND_ASSIGN(VRDeviceBase);

gpu/ipc/common/BUILD.gn

@@ -214,6 +214,10 @@ mojom("interfaces") {
     "vulkan_ycbcr_info.mojom",
   ]
 
+  if (is_win) {
+    sources += [ "luid.mojom" ]
+  }
+
   public_deps = [
     ":gpu_preferences_interface",
     "//mojo/public/mojom/base",
@@ -269,6 +273,24 @@ mojom("interfaces") {
     },
   ]
 
+  if (is_win) {
+    shared_cpp_typemaps += [
+      {
+        types = [
+          {
+            mojom = "gpu.mojom.Luid"
+            cpp = "::LUID"
+          },
+        ]
+        traits_headers = [ "luid_mojom_traits.h" ]
+        traits_public_deps = [
+          ":mojom_traits",
+          "//gpu/config",
+        ]
+      },
+    ]
+  }
+
   cpp_typemaps = shared_cpp_typemaps
   blink_cpp_typemaps = shared_cpp_typemaps
 
@@ -399,10 +421,6 @@ mojom("interfaces") {
           mojom = "gpu.mojom.ImageDecodeAcceleratorSupportedProfile"
           cpp = "::gpu::ImageDecodeAcceleratorSupportedProfile"
         },
-        {
-          mojom = "gpu.mojom.Luid"
-          cpp = "::LUID"
-        },
       ]
       traits_sources = [ "gpu_info_mojom_traits.cc" ]
       traits_headers = [ "gpu_info_mojom_traits.h" ]
@@ -584,6 +602,9 @@ source_set("mojom_traits") {
   if (is_android) {
     sources += [ "vulkan_ycbcr_info_mojom_traits.h" ]
   }
+  if (is_win) {
+    sources += [ "luid_mojom_traits.h" ]
+  }
   if (enable_vulkan) {
     deps += [ ":vulkan_types_mojom_traits" ]
   }

gpu/ipc/common/gpu_info.mojom

@@ -6,19 +6,14 @@
 module gpu.mojom;
 
 import "gpu/ipc/common/dx_diag_node.mojom";
+[EnableIf=is_win]
+import "gpu/ipc/common/luid.mojom";
 import "mojo/public/mojom/base/time.mojom";
 import "ui/gfx/geometry/mojom/geometry.mojom";
 
 [EnableIf=supports_vulkan]
 import "gpu/ipc/common/vulkan_info.mojom";
 
-// Corresponds to LUID in dxgi.h
-[EnableIf=is_win]
-struct Luid {
-  int32 high;
-  uint32 low;
-};
-
 // gpu::GPUInfo::GPUDevice
 struct GpuDevice {
   uint32 vendor_id;

gpu/ipc/common/gpu_info_mojom_traits.cc

@@ -378,15 +378,6 @@ bool StructTraits<gpu::mojom::OverlayInfoDataView, gpu::OverlayInfo>::Read(
   return data.ReadYuy2OverlaySupport(&out->yuy2_overlay_support) &&
          data.ReadNv12OverlaySupport(&out->nv12_overlay_support);
 }
-
-// static
-bool StructTraits<gpu::mojom::LuidDataView, LUID>::Read(
-    gpu::mojom::LuidDataView data,
-    LUID* out) {
-  out->HighPart = data.high();
-  out->LowPart = data.low();
-  return true;
-}
 #endif
 
 bool StructTraits<gpu::mojom::GpuInfoDataView, gpu::GPUInfo>::Read(

gpu/ipc/common/gpu_info_mojom_traits.h

@@ -257,15 +257,6 @@ struct StructTraits<gpu::mojom::OverlayInfoDataView, gpu::OverlayInfo> {
   }
 };
 
-template <>
-struct StructTraits<gpu::mojom::LuidDataView, LUID> {
-  static bool Read(gpu::mojom::LuidDataView data, LUID* out);
-
-  static int32_t high(const LUID& input) { return input.HighPart; }
-
-  static uint32_t low(const LUID& input) { return input.LowPart; }
-};
-
 #endif
 
 template <>

gpu/ipc/common/luid.mojom

@@ -0,0 +1,12 @@
+// Copyright 2020 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.
+
+module gpu.mojom;
+
+// Corresponds to LUID in dxgi.h
+[EnableIf=is_win]
+struct Luid {
+  int32 high;
+  uint32 low;
+};

gpu/ipc/common/luid_mojom_traits.h

@@ -0,0 +1,27 @@
+// Copyright 2020 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 GPU_IPC_COMMON_LUID_MOJOM_TRAITS_H_
+#define GPU_IPC_COMMON_LUID_MOJOM_TRAITS_H_
+
+#include "gpu/ipc/common/luid.mojom-shared.h"
+
+namespace mojo {
+
+template <>
+struct StructTraits<gpu::mojom::LuidDataView, LUID> {
+  static bool Read(gpu::mojom::LuidDataView data, LUID* out) {
+    out->HighPart = data.high();
+    out->LowPart = data.low();
+    return true;
+  }
+
+  static int32_t high(const LUID& input) { return input.HighPart; }
+
+  static uint32_t low(const LUID& input) { return input.LowPart; }
+};
+
+}  // namespace mojo
+
+#endif  // GPU_IPC_COMMON_LUID_MOJOM_TRAITS_H_