chromium: remove deprecated libgnome-keyring dependency

libgnome-keyring has been deprecated for a long time.
It has been superseded by libsecret, which allows access to not only
GNOME Keyring secret manager but any other service implementing
the Secret Service D-Bus API.

In fact Chromium links against libsecret when use_glib is enabled:

https://source.chromium.org/chromium/chromium/src/+/main:components/os_crypt/BUILD.gn;l=142;drc=35be6215ec8f09e50176f36753c68f26c63d1885

And use_glib is on by default on Linux:

https://source.chromium.org/chromium/chromium/src/+/main:components/os_crypt/BUILD.gn;l=142;drc=35be6215ec8f09e50176f36753c68f26c63d1885

Unfortunately, Chromium is vendoring libsecret:

https://source.chromium.org/chromium/chromium/src/+/main:components/os_crypt/BUILD.gn;l=187;drc=35be6215ec8f09e50176f36753c68f26c63d1885

We need to disable the flag explicitly, since it is enabled by default:

https://source.chromium.org/chromium/chromium/src/+/main:components/os_crypt/features.gni;l=11;drc=35be6215ec8f09e50176f36753c68f26c63d1885

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

@@ -40,7 +40,6 @@
 
 # Package customization:
 , gnomeSupport ? false, gnome2 ? null
-, gnomeKeyringSupport ? false, libgnome-keyring3 ? null
 , cupsSupport ? true, cups ? null
 , proprietaryCodecs ? true
 , pulseSupport ? false, libpulseaudio ? null
@@ -155,7 +154,6 @@ let
       libepoxy
     ] ++ optional systemdSupport systemd
       ++ optionals gnomeSupport [ gnome2.GConf libgcrypt ]
-      ++ optional gnomeKeyringSupport libgnome-keyring3
       ++ optionals cupsSupport [ libgcrypt cups ]
       ++ optional pulseSupport libpulseaudio;
 
@@ -271,7 +269,7 @@ let
 
       # Optional features:
       use_gio = true;
-      use_gnome_keyring = gnomeKeyringSupport;
+      use_gnome_keyring = false; # Superseded by libsecret
       use_cups = cupsSupport;
 
       # Feature overrides:

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

@@ -9,7 +9,6 @@
 # Note: enable* flags should not require full rebuilds (i.e. only affect the wrapper)
 , channel ? "stable"
 , gnomeSupport ? false, gnome2 ? null
-, gnomeKeyringSupport ? false
 , proprietaryCodecs ? true
 , enableWideVine ? false
 , ungoogled ? false # Whether to build chromium or ungoogled-chromium
@@ -46,7 +45,7 @@ let
 
     mkChromiumDerivation = callPackage ./common.nix ({
       inherit channel chromiumVersionAtLeast versionRange;
-      inherit gnome2 gnomeSupport gnomeKeyringSupport proprietaryCodecs
+      inherit gnome2 gnomeSupport proprietaryCodecs
               cupsSupport pulseSupport ungoogled;
       gnChromium = gn.overrideAttrs (oldAttrs: {
         inherit (upstream-info.deps.gn) version;