From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Samuel Attard <sattard@slack-corp.com>
Date: Thu, 4 Jul 2019 15:57:09 -0700
Subject: src: expose MaybeInitializeContext to allow existing contexts

Splits the node.js specific tweak intialization of NewContext into a new
helper MaybeInitializeContext so that embedders with existing contexts
can still use them in a node Environment now that primordials are
initialized and required so early.

diff --git a/src/api/environment.cc b/src/api/environment.cc
index 35e8666ef771c56a1bcd441c99d4483a0d3e90bf..443f49320b2e6720f932fcfcefdbe6e539594964 100644
--- a/src/api/environment.cc
+++ b/src/api/environment.cc
@@ -357,6 +357,13 @@ Local<Context> NewContext(Isolate* isolate,
                           Local<ObjectTemplate> object_template) {
   auto context = Context::New(isolate, nullptr, object_template);
   if (context.IsEmpty()) return context;
+
+  return MaybeInitializeContext(context, object_template);
+}
+
+Local<Context> MaybeInitializeContext(Local<Context> context,
+                                      Local<ObjectTemplate> object_template) {
+  Isolate* isolate = context->GetIsolate();
   HandleScope handle_scope(isolate);
 
   context->SetEmbedderData(ContextEmbedderIndex::kAllowWasmCodeGeneration,
diff --git a/src/node.h b/src/node.h
index a2b47d1cf984ec36994b477b371cdf262191ab9c..c51fb1a6a6e497a091e2ba0b147e3d7b6a4d685c 100644
--- a/src/node.h
+++ b/src/node.h
@@ -303,6 +303,14 @@ NODE_EXTERN v8::Local<v8::Context> NewContext(
     v8::Local<v8::ObjectTemplate> object_template =
         v8::Local<v8::ObjectTemplate>());
 
+// Runs Node.js-specific tweaks on an already constructed context
+// This is not dead code, it is exposed for embedders so that they
+// can construct their own context and still use it in a node Environment.
+NODE_EXTERN v8::Local<v8::Context> MaybeInitializeContext(
+    v8::Local<v8::Context> context,
+    v8::Local<v8::ObjectTemplate> object_template =
+        v8::Local<v8::ObjectTemplate>());
+
 // If `platform` is passed, it will be used to register new Worker instances.
 // It can be `nullptr`, in which case creating new Workers inside of
 // Environments that use this `IsolateData` will not work.