Add "Supports overlays" information to about:gpu.

gpu/ipc/common/gpu_info_struct_traits.h

Index: gpu/ipc/common/gpu_info_struct_traits.h
diff --git a/gpu/ipc/common/gpu_info_struct_traits.h b/gpu/ipc/common/gpu_info_struct_traits.h
index 073ce7bcba38f33bed8920618acf54da6785a289..415fc49e9d4154ac5bec6f28198bb054544cb15c 100644
--- a/gpu/ipc/common/gpu_info_struct_traits.h
+++ b/gpu/ipc/common/gpu_info_struct_traits.h
@@ -240,6 +240,10 @@ struct StructTraits<gpu::mojom::GpuInfoDataView, gpu::GPUInfo> {
     return input.passthrough_cmd_decoder;
   }
 
+  static bool supports_overlays(const gpu::GPUInfo& input) {
+    return input.supports_overlays;
+  }
+
   static gpu::CollectInfoResult basic_info_state(const gpu::GPUInfo& input) {
     return input.basic_info_state;
   }