Turning off ipp_message_parser_fuzzer round 2

Seems that some fuzzers are running on linux with 'target_os="chromeos"' in
their gn args; this should actually turn it off.

Bug: chromium:831914
Test: confirmed fuzzing target is hidden
Change-Id: I68e06123c8a3b5e75a83d63640f7339b8ccdae25
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1696209Reviewed-by: Sean Kau <skau@chromium.org>
Commit-Queue: Luum Habtemariam <luum@chromium.org>
Cr-Commit-Position: refs/heads/master@{#676125}

chrome/services/cups_ipp_parser/public/cpp/BUILD.gn

@@ -27,7 +27,7 @@ if (use_cups) {
 
   # Fuzzer target only available on fuzzing builds.
   # TODO(crbug.com/831914): Enable this fuzzer once its running on CrOS only.
-  if (use_fuzzing_engine && is_chromeos) {
+  if (false) {  # use_fuzzing_engine && is_chromeos
     fuzzer_test("ipp_message_parser_fuzzer") {
       sources = [
         "ipp_message_parser_fuzzer.cc",