Add standard "Must be after no_chromium_code" comment in GN files.

R=thakis@chromium.org

Review URL: https://codereview.chromium.org/1411563004 .

1 files changed, 1 insertions, 2 deletions

diff --git a/BUILD.gn b/BUILD.gn
index abd189b8eb..6accde5b3f 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -554,8 +554,7 @@ static_library("fxge") {
   configs += [
     ":pdfium_config",
     "//build/config/compiler:no_chromium_code",
-    # As of this writing, this needs to be last to suppress a -Wswitch warning.
-    # https://crbug.com/547906
+    # Must be after no_chromium_code for warning flags to be ordered correctly.
     ":fxge_warnings",
   ]