fix: enable worker threads (#20416)

patches/node/fix_enable_worker_threads.patch

@@ -0,0 +1,29 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Shelley Vohr <shelley.vohr@gmail.com>
+Date: Thu, 3 Oct 2019 19:03:30 +0200
+Subject: fix: enable worker_threads
+
+Electron sets NODE_USE_V8_PLATFORM to false, because Electron
+initializes the v8 platform itself and Node.js worker thread
+initialization relies on the platform it uses having been set inside
+code guarded by NODE_USE_V8_PLATFORM.
+
+This commit fixes this problem by changing node_worker to use the three-arg
+implementation of `NewIsolate` to prevent it trying to use a possibly-null ptr.
+
+diff --git a/src/node_worker.cc b/src/node_worker.cc
+index 11e44a92757e41e737087c5d08ce9931f0b0fab3..3dce5e25980ce2c6f17cda02dab9c0f8b4fab813 100644
+--- a/src/node_worker.cc
++++ b/src/node_worker.cc
+@@ -116,7 +116,10 @@ class WorkerThreadData {
+     : w_(w) {
+     CHECK_EQ(uv_loop_init(&loop_), 0);
+ 
+-    Isolate* isolate = NewIsolate(w->array_buffer_allocator_.get(), &loop_);
++    Isolate* isolate = NewIsolate(
++        w->array_buffer_allocator_.get(),
++        &loop_,
++        w->platform_);
+     CHECK_NOT_NULL(isolate);
+ 
+     {