chromium.mkDerivation: update flags

* Remove libselinux flag: it's no longer supported;
* Use new gold flags.

pkgs/applications/networking/browsers/chromium/common.nix

@@ -20,7 +20,6 @@
 , libexif ? null # only needed for Chromium before version 51
 
 # package customization
-, enableSELinux ? false, libselinux ? null
 , enableNaCl ? false
 , enableHotwording ? false
 , enableWideVine ? false
@@ -100,7 +99,6 @@ let
       pciutils protobuf speechd libXdamage
     ] ++ optional gnomeKeyringSupport libgnome_keyring3
       ++ optionals gnomeSupport [ gnome.GConf libgcrypt ]
-      ++ optional enableSELinux libselinux
       ++ optionals cupsSupport [ libgcrypt cups ]
       ++ optional pulseSupport libpulseaudio
       ++ optional (versionAtLeast version "56.0.0.0") gtk3;
@@ -139,8 +137,8 @@ let
 
     gnFlags = mkGnFlags ({
       linux_use_bundled_binutils = false;
-      linux_use_bundled_gold = false;
-      linux_use_gold_flags = true;
+      use_gold = true;
+      gold_path = "${stdenv.cc}/bin";
       is_debug = false;
 
       proprietary_codecs = false;
@@ -151,7 +149,6 @@ let
       enable_nacl = enableNaCl;
       enable_hotwording = enableHotwording;
       enable_widevine = enableWideVine;
-      selinux = enableSELinux;
       use_cups = cupsSupport;
     } // {
       treat_warnings_as_errors = false;

pkgs/applications/networking/browsers/chromium/default.nix

@@ -2,7 +2,6 @@
 
 # package customization
 , channel ? "stable"
-, enableSELinux ? false
 , enableNaCl ? false
 , enableHotwording ? false
 , gnomeSupport ? false, gnome ? null
@@ -22,7 +21,7 @@ let
     upstream-info = (callPackage ./update.nix {}).getChannel channel;
 
     mkChromiumDerivation = callPackage ./common.nix {
-      inherit enableSELinux enableNaCl enableHotwording gnomeSupport gnome
+      inherit enableNaCl enableHotwording gnomeSupport gnome
               gnomeKeyringSupport proprietaryCodecs cupsSupport pulseSupport
               enableWideVine;
     };