Un-nest configs in GN files.

build/secondary/testing/gtest/BUILD.gn

Index: build/secondary/testing/gtest/BUILD.gn
diff --git a/build/secondary/testing/gtest/BUILD.gn b/build/secondary/testing/gtest/BUILD.gn
index a9f5007b2670a8619048c58e451396c26cc8f69f..8e5cdcccede667ffd151cfb0d652dc1cd00bcc7a 100644
--- a/build/secondary/testing/gtest/BUILD.gn
+++ b/build/secondary/testing/gtest/BUILD.gn
@@ -58,6 +58,15 @@ config("gtest_direct_config") {
   defines = [ "UNIT_TEST" ]
 }
 
+config("gtest_warnings") {
+  if (is_win && is_clang) {
+    # The Mutex constructor initializer list in gtest-port.cc is incorrectly
+    # ordered. See
+    # https://groups.google.com/d/msg/googletestframework/S5uSV8L2TX8/U1FaTDa6J6sJ.
+    cflags = [ "-Wno-reorder" ]
+  }
+}
+
 static_library("gtest") {
   # TODO http://crbug.com/412064 enable this flag all the time.
   testonly = !is_component_build
@@ -121,17 +130,12 @@ static_library("gtest") {
   public_configs = [ ":gtest_direct_config" ]
 
   configs -= [ "//build/config/compiler:chromium_code" ]
-  configs += [ "//build/config/compiler:no_chromium_code" ]
-
-  config("gtest_warnings") {
-    if (is_win && is_clang) {
-      # The Mutex constructor initializer list in gtest-port.cc is incorrectly
-      # ordered. See
-      # https://groups.google.com/d/msg/googletestframework/S5uSV8L2TX8/U1FaTDa6J6sJ.
-      cflags = [ "-Wno-reorder" ]
-    }
-  }
-  configs += [ ":gtest_warnings" ]
+  configs += [
+    "//build/config/compiler:no_chromium_code",
+
+    # Must be after no_chromium_code for warning flags to be ordered correctly.
+    ":gtest_warnings",
+  ]
 }
 
 source_set("gtest_main") {