GN: forward_variables_from shouldn't clobber vars.

third_party/gif_player/BUILD.gn

 # Copyright 2015 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/config/android/rules.gni")
 
 android_library("gif_player_java") {
   java_files = [
     "src/jp/tomorrowkey/android/gifplayer/BaseGifDrawable.java",
     "src/jp/tomorrowkey/android/gifplayer/BaseGifImage.java",
   ]
-  run_findbugs = false
+  run_findbugs_override = false
 }