OpenVR SDK 1.26.7

IVROverlay:

• Removed defunct GetOverlayTransformOverlayRelative and SetOverlayTransformOverlayRelative interfaces

EVREventType:

• Removed defunct VREvent_SceneFocusChanged
• Added VREvent_SceneAppPipeDisconnected - Called when the scene app's pipe has been closed (data is process)

ETrackedDeviceProperty:

• Added Prop_Hmd_SupportsHDR10_Bool
• Added Prop_Hmd_EnableParallelRenderCameras_Bool (drivers can set this compensate for canted and/or clocked displays)
• Added Prop_DriverProvidedChaperoneJson_String (overrides Prop_DriverProvidedChaperonePath_String)
• Renamed Prop_Hmd_SupportsRoomViewDirect_Bool
• Renamed Prop_Hmd_SupportsAppThrottling_Bool
• Added Prop_Hmd_SupportsGpuBusMonitoring_Bool
• Added Prop_DSCVersion_Int32
• Added Prop_DSCSliceCount_Int32
• Added Prop_DSCBPPx16_Int32

VROverlayTransformType:

• Removed defunct VROverlayTransform_SystemOverlay
• Added VROverlayTransform_Subview

Compositor_CumulativeStats:

• Added m_nNumFrameSubmits
• Added m_flSumCompositorCPUTimeMS
• Added m_flSumCompositorGPUTimeMS
• Added m_flSumTargetFrameTimes
• Added m_flSumApplicationCPUTimeMS
• Added m_flSumApplicationGPUTimeMS
• Added m_nNumFramesWithDepth