chromiumDev: Fix two build errors

Python 3 is now required (hard-coded in some scripts, but other scripts
still require Python 2) and a patch is required for [0].

[0]: https://bugs.chromium.org/p/chromium/issues/detail?id=1192875

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

@@ -7,7 +7,7 @@
 , xdg-utils, yasm, nasm, minizip, libwebp
 , libusb1, pciutils, nss, re2
 
-, python2Packages, perl, pkg-config
+, python2Packages, python3Packages, perl, pkg-config
 , nspr, systemd, libkrb5
 , util-linux, alsaLib
 , bison, gperf
@@ -130,6 +130,8 @@ let
       ninja which python2Packages.python perl pkg-config
       python2Packages.ply python2Packages.jinja2 nodejs
       gnutar python2Packages.setuptools
+    ] ++ optionals (chromiumVersionAtLeast "91") [
+      python3Packages.python
     ];
 
     buildInputs = defaultDependencies ++ [
@@ -160,7 +162,9 @@ let
       url = "https://raw.githubusercontent.com/archlinux/svntogit-packages/61b0ab526d2aa3c62fa20bb756461ca9a482f6c6/trunk/chromium-fix-libva-redef.patch";
       sha256 = "1qj4sn1ngz0p1l1w3346kanr1sqlr3xdzk1f1i86lqa45mhv77ny";
     }) ++ optional (chromiumVersionAtLeast "90")
-      ./fix-missing-atspi2-dependency.patch
+      ./patches/fix-missing-atspi2-dependency.patch
+    ++ optional (chromiumVersionAtLeast "91")
+      ./patches/closure_compiler-Use-the-Java-binary-from-the-system.patch
     ;
 
     postPatch = ''

pkgs/applications/networking/browsers/chromium/patches/closure_compiler-Use-the-Java-binary-from-the-system.patch

@@ -0,0 +1,31 @@
+From e031b8be0fb2a22f953c034cdf08ca9befe130d2 Mon Sep 17 00:00:00 2001
+From: Michael Weiss <dev.primeos@gmail.com>
+Date: Sun, 11 Apr 2021 18:05:12 +0200
+Subject: [PATCH] closure_compiler: Use the Java binary from the system
+
+The bundled Java binary (third_party/jdk/current/bin/java) is missing in
+the tarball and we want to use the one from the system anyway.
+This reverts part of [0].
+
+[0]: https://chromium-review.googlesource.com/c/chromium/src/+/2778794
+---
+ third_party/closure_compiler/compiler.py | 3 +--
+ 1 file changed, 1 insertion(+), 2 deletions(-)
+
+diff --git a/third_party/closure_compiler/compiler.py b/third_party/closure_compiler/compiler.py
+index 75690ceb9749..7b9c76f74290 100755
+--- a/third_party/closure_compiler/compiler.py
++++ b/third_party/closure_compiler/compiler.py
+@@ -13,8 +13,7 @@ import subprocess
+ 
+ 
+ _CURRENT_DIR = os.path.join(os.path.dirname(__file__))
+-_JAVA_PATH = os.path.join(_CURRENT_DIR, "..", "jdk", "current", "bin", "java")
+-assert os.path.isfile(_JAVA_PATH), "java only allowed in android builds"
++_JAVA_PATH = "java"
+ 
+ class Compiler(object):
+   """Runs the Closure compiler on given source files to typecheck them
+-- 
+2.20.1
+