chromiumDev: Unbreak the build by using LLVM 11

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

@@ -90,6 +90,5 @@ mkChromiumDerivation (base: rec {
     platforms = platforms.linux;
     hydraPlatforms = if channel == "stable" then ["aarch64-linux" "x86_64-linux"] else [];
     timeout = 172800; # 48 hours
-    broken = channel == "dev"; # Requires LLVM 11
   };
 })

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

@@ -1,4 +1,4 @@
-{ newScope, config, stdenv, llvmPackages_9, llvmPackages_10
+{ newScope, config, stdenv, llvmPackages_10, llvmPackages_11
 , makeWrapper, ed, gnugrep, coreutils
 , glib, gtk3, gnome3, gsettings-desktop-schemas, gn, fetchgit
 , libva ? null
@@ -45,6 +45,7 @@ let
         };
       });
     } // lib.optionalAttrs (lib.versionAtLeast upstream-info.version "86") {
+      llvmPackages = llvmPackages_11;
       gnChromium = gn.overrideAttrs (oldAttrs: {
         version = "2020-07-20";
         src = fetchgit {