chromium: Disable Hydra builds of -dev and -beta

It's not the job of Nixpkgs to distribute beta versions of upstream
packages. More importantly, building these delays channel updates by
several hours, which is bad for our security fix turnaround time.

nixos/release.nix

@@ -210,7 +210,7 @@ in rec {
   tests.blivet = callTest tests/blivet.nix {};
   tests.boot = callSubTests tests/boot.nix {};
   tests.cadvisor = hydraJob (import tests/cadvisor.nix { system = "x86_64-linux"; });
-  tests.chromium = callSubTests tests/chromium.nix {};
+  tests.chromium = callSubTests tests/chromium.nix { system = "x86_64-linux"; };
   tests.cjdns = callTest tests/cjdns.nix {};
   tests.containers-ipv4 = callTest tests/containers-ipv4.nix {};
   tests.containers-ipv6 = callTest tests/containers-ipv6.nix {};

nixos/tests/chromium.nix

@@ -2,8 +2,6 @@
 , pkgs ? import ../.. { inherit system; }
 , channelMap ? {
     stable = pkgs.chromium;
-    beta   = pkgs.chromiumBeta;
-    dev    = pkgs.chromiumDev;
   }
 }:
 

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

@@ -1,4 +1,4 @@
-{ stdenv, mkChromiumDerivation }:
+{ stdenv, mkChromiumDerivation, channel }:
 
 with stdenv.lib;
 
@@ -35,5 +35,6 @@ mkChromiumDerivation (base: rec {
     maintainers = with maintainers; [ chaoflow ];
     license = licenses.bsd3;
     platforms = platforms.linux;
+    hydraPlatforms = if channel == "stable" then ["x86_64-linux"] else [];
   };
 })

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

@@ -29,7 +29,7 @@ let
               hiDPISupport;
     };
 
-    browser = callPackage ./browser.nix { };
+    browser = callPackage ./browser.nix { inherit channel; };
 
     plugins = callPackage ./plugins.nix {
       inherit enablePepperFlash enableWideVine;