Auto merge of #23764 - jdm:hl-startup, r=paulrouget

Adjust gstreamer plugins for UWP.

This excludes a set of plugins and dependencies that are currently built with MinGW and will therefore cause WACK errors. The resulting set of plugins loaded by the UWP app are still not UWP-clean, but this makes it much easier to switch over to UWP-clean binaries in the future.

These changes also allow the HoloLens 2 app to start and load again after #23712.

---
- [x] `./mach build -d` does not report any errors
- [x] `./mach test-tidy` does not report any errors
- [x] These changes fix #23757
- [x] These changes do not require tests because no tests for windows or UWP.

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python/servo/build_commands.py

@@ -606,7 +606,7 @@ class MachCommands(CommandBase):
                 target_triple = target or host_triple()
                 if "aarch64" not in target_triple:
                     print("Packaging gstreamer DLLs")
-                    if not package_gstreamer_dlls(servo_exe_dir, target_triple):
+                    if not package_gstreamer_dlls(servo_exe_dir, target_triple, uwp):
                         status = 1
                 print("Packaging MSVC DLLs")
                 if not package_msvc_dlls(servo_exe_dir, target_triple):
@@ -658,7 +658,7 @@ class MachCommands(CommandBase):
         return check_call(["cargo", "clean"] + opts, env=self.build_env(), verbose=verbose)
 
 
-def package_gstreamer_dlls(servo_exe_dir, target):
+def package_gstreamer_dlls(servo_exe_dir, target, uwp):
     msvc_x64 = "64" if "x86_64" in target else ""
     gst_x64 = "X86_64" if msvc_x64 == "64" else "X86"
     gst_root = ""
@@ -684,7 +684,6 @@ def package_gstreamer_dlls(servo_exe_dir, target):
         "glib-2.0-0.dll",
         "gmodule-2.0-0.dll",
         "gobject-2.0-0.dll",
-        "graphene-1.0-0.dll",
         "gstapp-1.0-0.dll",
         "gstaudio-1.0-0.dll",
         "gstbase-1.0-0.dll",
@@ -697,33 +696,42 @@ def package_gstreamer_dlls(servo_exe_dir, target):
         "gstreamer-1.0-0.dll",
         "gstriff-1.0-0.dll",
         "gstrtp-1.0-0.dll",
-        "gstsctp-1.0-0.dll",
         "gstsdp-1.0-0.dll",
         "gsttag-1.0-0.dll",
         "gstvideo-1.0-0.dll",
         "gstwebrtc-1.0-0.dll",
         "intl-8.dll",
-        "libgmp-10.dll",
-        "libgnutls-30.dll",
-        "libhogweed-4.dll",
-        "libjpeg-8.dll",
-        "libnettle-6.dll.",
-        "libpng16-16.dll",
-        "libogg-0.dll",
-        "libopus-0.dll",
-        "libtasn1-6.dll",
-        "libtheora-0.dll",
-        "libtheoradec-1.dll",
-        "libtheoraenc-1.dll",
-        "libvorbis-0.dll",
-        "libvorbisenc-2.dll",
-        "libwinpthread-1.dll",
-        "nice-10.dll",
         "orc-0.4-0.dll",
         "swresample-3.dll",
         "z-1.dll",
     ]
 
+    # FIXME: until we build with UWP-enabled GStreamer binaries,
+    #        almost every UWP-friendly DLL depends on this
+    #        incompatible DLL.
+    gst_dlls += ["libwinpthread-1.dll"]
+
+    if not uwp:
+        gst_dlls += [
+            "graphene-1.0-0.dll",
+            "gstsctp-1.0-0.dll",
+            "libgmp-10.dll",
+            "libgnutls-30.dll",
+            "libhogweed-4.dll",
+            "libjpeg-8.dll",
+            "libnettle-6.dll.",
+            "libogg-0.dll",
+            "libopus-0.dll",
+            "libpng16-16.dll",
+            "libtasn1-6.dll",
+            "libtheora-0.dll",
+            "libtheoradec-1.dll",
+            "libtheoraenc-1.dll",
+            "libvorbis-0.dll",
+            "libvorbisenc-2.dll",
+            "nice-10.dll",
+        ]
+
     missing = []
     for gst_lib in gst_dlls:
         try:
@@ -749,26 +757,30 @@ def package_gstreamer_dlls(servo_exe_dir, target):
         "gstplayback.dll",
         "gstinterleave.dll",
         "gstisomp4.dll",
-        "gstnice.dll",
-        "gstogg.dll",
-        "gstopengl.dll",
-        "gstopus.dll",
+        "gstlibav.dll",
         "gstproxy.dll",
-        "gstrtp.dll",
-        "gsttheora.dll",
         "gsttypefindfunctions.dll",
         "gstvideoconvert.dll",
         "gstvideofilter.dll",
         "gstvideoparsersbad.dll",
         "gstvideoscale.dll",
         "gstvolume.dll",
-        "gstvorbis.dll",
-        "gstvpx.dll",
-        "gstwebrtc.dll",
         "gstwasapi.dll",
-        "gstlibav.dll",
     ]
 
+    if not uwp:
+        gst_dlls += [
+            "gstnice.dll",
+            "gstogg.dll",
+            "gstopengl.dll",
+            "gstopus.dll",
+            "gstrtp.dll",
+            "gsttheora.dll",
+            "gstvorbis.dll",
+            "gstvpx.dll",
+            "gstwebrtc.dll",
+        ]
+
     gst_plugin_path_root = os.environ.get("GSTREAMER_PACKAGE_PLUGIN_PATH") or gst_root
     gst_plugin_path = path.join(gst_plugin_path_root, "lib", "gstreamer-1.0")
     if not os.path.exists(gst_plugin_path):