NOT for review (for discussion): Query IOSurfaceIsInUse in the browser process

gpu/ipc/service/image_transport_surface_overlay_mac.mm

Index: gpu/ipc/service/image_transport_surface_overlay_mac.mm
diff --git a/gpu/ipc/service/image_transport_surface_overlay_mac.mm b/gpu/ipc/service/image_transport_surface_overlay_mac.mm
index ef4b795dc883ae5c4da1776c97eab64da5f40a87..a66321305689ff91f8ffbef21fffbd992253f3d3 100644
--- a/gpu/ipc/service/image_transport_surface_overlay_mac.mm
+++ b/gpu/ipc/service/image_transport_surface_overlay_mac.mm
@@ -166,14 +166,16 @@ void IOSurfaceContextNoOp(scoped_refptr<ui::IOSurfaceContext>) {
   for (auto& query : ca_layer_in_use_queries_) {
     gpu::TextureInUseResponse response;
     response.texture = query.texture;
-    bool in_use = false;
+    response.in_use_valid = false;
     gl::GLImageIOSurface* io_surface_image =
         gl::GLImageIOSurface::FromGLImage(query.image.get());
-    if (io_surface_image) {
-      in_use = io_surface_image->CanCheckIOSurfaceIsInUse() &&
-               IOSurfaceIsInUse(io_surface_image->io_surface());
+    if (query.needs_gpu_memory_buffer_handle && io_surface_image) {
+      response.in_use_valid = io_surface_image->CanCheckIOSurfaceIsInUse();
+      response.gpu_memory_buffer_handle.type =
+          gfx::GpuMemoryBufferType::IO_SURFACE_BUFFER;
+      response.gpu_memory_buffer_handle.mach_port.reset(
+          IOSurfaceCreateMachPort(io_surface_image->io_surface()));
     }
-    response.in_use = in_use;
     params.in_use_responses.push_back(std::move(response));
   }
   ca_layer_in_use_queries_.clear();