Run the WebGL conformance tests with the passthrough command decoder.

gpu/config/gpu_info.h

Index: gpu/config/gpu_info.h
diff --git a/gpu/config/gpu_info.h b/gpu/config/gpu_info.h
index fbb6aac4de9b6dcc03b00e2fcfdea9d9265468c1..86479489797542e9bffb8de1c33c9f5d5e06efdb 100644
--- a/gpu/config/gpu_info.h
+++ b/gpu/config/gpu_info.h
@@ -224,6 +224,9 @@ struct GPU_EXPORT GPUInfo {
   // True if the GPU is running in the browser process instead of its own.
   bool in_process_gpu;
 
+  // True if the GPU process is using the passthrough command decoder.
+  bool passthrough_cmd_decoder;
+
   // The state of whether the basic/context/DxDiagnostics info is collected and
   // if the collection fails or not.
   CollectInfoResult basic_info_state;