chromium: Switch from PipeWire 0.2 to the current 0.3.x releases

This should make it work more reliable and support additional features
like window sharing. See [0] for more details.

[0]: https://jgrulich.cz/2020/12/18/webrtc-chromium-updates-in-2020/

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

@@ -17,7 +17,7 @@
 , protobuf, speechd, libXdamage, cups
 , ffmpeg, libxslt, libxml2, at-spi2-core
 , jre8
-, pipewire_0_2
+, pipewire
 , libva
 , libdrm, wayland, mesa, libxkbcommon # Ozone
 
@@ -140,7 +140,7 @@ let
       libXScrnSaver libXcursor libXtst libxshmfence libGLU libGL
       pciutils protobuf speechd libXdamage at-spi2-core
       jre
-      pipewire_0_2
+      pipewire
       libva
       libdrm wayland mesa.drivers libxkbcommon
     ] ++ optional gnomeKeyringSupport libgnome-keyring3
@@ -266,6 +266,7 @@ let
       use_pulseaudio = true;
       link_pulseaudio = true;
     } // optionalAttrs (chromiumVersionAtLeast "89") {
+      rtc_pipewire_version = "0.3"; # TODO: Can be removed once ungoogled-chromium is at M90
       # Disable PGO (defaults to 2 since M89) because it fails without additional changes:
       # error: Could not read profile ../../chrome/build/pgo_profiles/chrome-linux-master-1610647094-405a32bcf15e5a84949640f99f84a5b9f61e2f2e.profdata: Unsupported instrumentation profile format version
       chrome_pgo_phase = 0;

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

@@ -2,7 +2,7 @@
 , llvmPackages_11, ed, gnugrep, coreutils, xdg-utils
 , glib, gtk3, gnome3, gsettings-desktop-schemas, gn, fetchgit
 , libva ? null
-, pipewire_0_2
+, pipewire
 , gcc, nspr, nss, runCommand
 , lib
 
@@ -161,7 +161,7 @@ in stdenv.mkDerivation {
 
   buildCommand = let
     browserBinary = "${chromiumWV}/libexec/chromium/chromium";
-    libPath = lib.makeLibraryPath [ libva pipewire_0_2 ];
+    libPath = lib.makeLibraryPath [ libva pipewire ];
 
   in with lib; ''
     mkdir -p "$out/bin"