Run the WebGL conformance tests with the passthrough command decoder.

content/browser/gpu/gpu_internals_ui.cc

Index: content/browser/gpu/gpu_internals_ui.cc
diff --git a/content/browser/gpu/gpu_internals_ui.cc b/content/browser/gpu/gpu_internals_ui.cc
index e5db500347597d009a17e7a2e984410647618f4f..17d924e5a4e1d981d2103487609f3db5b3a59821 100644
--- a/content/browser/gpu/gpu_internals_ui.cc
+++ b/content/browser/gpu/gpu_internals_ui.cc
@@ -128,6 +128,9 @@ base::DictionaryValue* GpuInfoAsDictionaryValue() {
   basic_info->Append(NewDescriptionValuePair(
       "In-process GPU", new base::FundamentalValue(gpu_info.in_process_gpu)));
   basic_info->Append(NewDescriptionValuePair(
+      "Passthrough Command Decoder",
+      new base::FundamentalValue(gpu_info.passthrough_cmd_decoder)));
+  basic_info->Append(NewDescriptionValuePair(
       "Sandboxed", new base::FundamentalValue(gpu_info.sandboxed)));
   basic_info->Append(NewDescriptionValuePair(
       "GPU0", GPUDeviceToString(gpu_info.gpu)));