WebVR compositor bypass via BrowserMain context + mailbox

device/vr/vr_device.h

Index: device/vr/vr_device.h
diff --git a/device/vr/vr_device.h b/device/vr/vr_device.h
index be836ee12016272cdbcb11abc704cd63380d2396..32eca92dad071e172acc1364d8d24262594dbbb2 100644
--- a/device/vr/vr_device.h
+++ b/device/vr/vr_device.h
@@ -30,10 +30,14 @@ class DEVICE_VR_EXPORT VRDevice {
   virtual void RequestPresent(const base::Callback<void(bool)>& callback) = 0;
   virtual void SetSecureOrigin(bool secure_origin) = 0;
   virtual void ExitPresent() = 0;
-  virtual void SubmitFrame(mojom::VRPosePtr pose) = 0;
+  virtual void SubmitFrame(int16_t frame_index,
+                           const gpu::MailboxHolder& mailbox,
+                           mojom::VRSubmitFrameClientPtr submit_client) = 0;
   virtual void UpdateLayerBounds(int16_t frame_index,
                                  mojom::VRLayerBoundsPtr left_bounds,
-                                 mojom::VRLayerBoundsPtr right_bounds) = 0;
+                                 mojom::VRLayerBoundsPtr right_bounds,
+                                 int16_t source_width,
+                                 int16_t source_height) = 0;
   virtual void GetVRVSyncProvider(mojom::VRVSyncProviderRequest request) = 0;
 
   virtual void AddDisplay(VRDisplayImpl* display);