gnu: ungoogled-chromium: Unexpire accelerated video decoding.

* gnu/packages/patches/ungoogled-chromium-accelerated-video-decode.patch: New file.
* gnu/local.mk (dist_patch_DATA): Adjust accordingly.
* gnu/packages/chromium.scm (%guix-patches): Add it.

gnu/local.mk

@@ -1847,6 +1847,7 @@ dist_patch_DATA =						\
   %D%/packages/patches/u-boot-riscv64-fix-extlinux.patch	\
   %D%/packages/patches/u-boot-rk3399-enable-emmc-phy.patch	\
   %D%/packages/patches/ucx-tcp-iface-ioctl.patch		\
+  %D%/packages/patches/ungoogled-chromium-accelerated-video-decode.patch	\
   %D%/packages/patches/ungoogled-chromium-extension-search-path.patch	\
   %D%/packages/patches/ungoogled-chromium-ffmpeg-compat.patch	\
   %D%/packages/patches/ungoogled-chromium-RUNPATH.patch		\

gnu/packages/chromium.scm

@@ -376,6 +376,9 @@ (define %guix-patches
         (local-file
          (assume-valid-file-name
           (search-patch "ungoogled-chromium-RUNPATH.patch")))
+        (local-file
+         (assume-valid-file-name
+          (search-patch "ungoogled-chromium-accelerated-video-decode.patch")))
         (local-file
          (assume-valid-file-name
           (search-patch "ungoogled-chromium-ffmpeg-compat.patch")))

gnu/packages/patches/ungoogled-chromium-accelerated-video-decode.patch

@@ -0,0 +1,18 @@
+Upstream Chromium no longer supports hardware accelerated video decoding
+on GNU/Linux, yet it still works fine on many systems.  This patch "unexpires"
+the support.
+
+Taken from Arch Linux:
+https://github.com/archlinux/svntogit-packages/blob/packages/chromium/trunk/unexpire-accelerated-video-decode-flag.patch
+
+--- a/chrome/browser/flag-metadata.json
++++ b/chrome/browser/flag-metadata.json
+@@ -1285,7 +1285,7 @@
+   {
+     "name": "enable-accelerated-video-decode",
+     "owners": [ "media-dev@chromium.org" ],
+-    "expiry_milestone": 93
++    "expiry_milestone": 99
+   },
+   {
+     "name": "enable-accessibility-live-caption",