Un-nest configs in GN files.

third_party/cld_2/BUILD.gn

Index: third_party/cld_2/BUILD.gn
diff --git a/third_party/cld_2/BUILD.gn b/third_party/cld_2/BUILD.gn
index 303dcbf53a8d2427da61e03450e1265f23ad1040..3edb31dae64f1aa62507195832bf80be55cb0f33 100644
--- a/third_party/cld_2/BUILD.gn
+++ b/third_party/cld_2/BUILD.gn
@@ -33,6 +33,14 @@ cld2_platform_support = "static"
 
 cld2_table_size = 2
 
+config("cld2_data_warnings") {
+  visibility = [ ":*" ]
+  if (is_clang) {
+    # The generated files don't have braces around subobject initializers.
+    cflags = [ "-Wno-missing-braces" ]
+  }
+}
+
 source_set("cld2_data") {
   sources = gypi_values.cld2_data_sources
   if (cld2_table_size == 0) {
@@ -46,15 +54,11 @@ source_set("cld2_data") {
     "src/public",
   ]
 
-  config("cld2_data_warnings") {
-    if (is_clang) {
-      # The generated files don't have braces around subobject initializers.
-      cflags = [ "-Wno-missing-braces" ]
-    }
-  }
   configs -= [ "//build/config/compiler:chromium_code" ]
-  configs += [ "//build/config/compiler:no_chromium_code" ]
-  configs += [ ":cld2_data_warnings" ]
+  configs += [
+    ":cld2_data_warnings",
+    "//build/config/compiler:no_chromium_code",
+  ]
 }
 
 # As in the corresponding gyp file, this just builds the core interfaces for