HDRP integration

ScriptableRenderPipeline/HDRenderPipeline/HDCustomSamplerId.cs

         TPDisplayShadows,
         TPRenderDeferredLighting,
 
+        // Misc
+        VolumeUpdate,
+
         Max
     }
 }

ScriptableRenderPipeline/HDRenderPipeline/HDRenderPipeline.cs

             else
             {
                 m_CurrentDebugDisplaySettings = m_DebugDisplaySettings;
+
+                using (new ProfilingSample(cmd, "Volume Update", GetSampler(CustomSamplerId.VolumeUpdate)))
+                {
+                    VolumeManager.instance.Update(camera.transform, -1);
+                }
             }
 
             ApplyDebugDisplaySettings(cmd);