Disable BGRA support on linux.

gpu/command_buffer/service/feature_info.cc

Index: gpu/command_buffer/service/feature_info.cc
diff --git a/gpu/command_buffer/service/feature_info.cc b/gpu/command_buffer/service/feature_info.cc
index 84fc2e4c5642f7050c9976b9517160af2d28b59d..283cb8a0857c13996f5758b14fe840fd89c1db2b 100644
--- a/gpu/command_buffer/service/feature_info.cc
+++ b/gpu/command_buffer/service/feature_info.cc
@@ -527,7 +527,8 @@ void FeatureInfo::InitializeFeatures() {
   }
 
   if (extensions.Contains("GL_EXT_read_format_bgra") ||
-      extensions.Contains("GL_EXT_bgra")) {
+      extensions.Contains("GL_EXT_bgra") ||
+      workarounds_.support_bgra_color_read_format) {
     enable_read_format_bgra = true;
   }