From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Anonymous <anonymous@electronjs.org>
Date: Thu, 20 Sep 2018 17:45:11 -0700
Subject: blink_world_context.patch

This exposes a method for obtaining a reference to an isolated world, which is
otherwise not available in the Blink API.

diff --git a/third_party/blink/public/web/web_local_frame.h b/third_party/blink/public/web/web_local_frame.h
index 6bbb5d6c2d98e5316eb7efa350a8fe23e26d6bfe..84f5e7b034c4dfaba72fd75f1d91cf2badf7c646 100644
--- a/third_party/blink/public/web/web_local_frame.h
+++ b/third_party/blink/public/web/web_local_frame.h
@@ -350,6 +350,8 @@ class WebLocalFrame : public WebFrame {
   // Returns the world ID associated with |script_context|.
   virtual int32_t GetScriptContextWorldId(
       v8::Local<v8::Context> script_context) const = 0;
+  virtual v8::Local<v8::Context> WorldScriptContext(
+      v8::Isolate* isolate, int world_id) const = 0;
 
   // Executes script in the context of the current page and returns the value
   // that the script evaluated to with callback. Script execution can be
diff --git a/third_party/blink/renderer/core/frame/web_local_frame_impl.cc b/third_party/blink/renderer/core/frame/web_local_frame_impl.cc
index b1185d289c6c92bd2202823948f3ca71e80aa38d..f034415e9bdd00368cfc2e6180f0f658a62eae37 100644
--- a/third_party/blink/renderer/core/frame/web_local_frame_impl.cc
+++ b/third_party/blink/renderer/core/frame/web_local_frame_impl.cc
@@ -994,6 +994,13 @@ v8::Local<v8::Object> WebLocalFrameImpl::GlobalProxy() const {
   return MainWorldScriptContext()->Global();
 }
 
+v8::Local<v8::Context> WebLocalFrameImpl::WorldScriptContext(
+    v8::Isolate* isolate, int world_id) const {
+  scoped_refptr<DOMWrapperWorld> world = DOMWrapperWorld::EnsureIsolatedWorld(
+      isolate, world_id);
+  return ToScriptState(GetFrame(), *world)->GetContext();
+}
+
 bool WebFrame::ScriptCanAccess(WebFrame* target) {
   return BindingSecurity::ShouldAllowAccessToFrame(
       CurrentDOMWindow(V8PerIsolateData::MainThreadIsolate()),
diff --git a/third_party/blink/renderer/core/frame/web_local_frame_impl.h b/third_party/blink/renderer/core/frame/web_local_frame_impl.h
index 4e5b1ae37464667f66c42f854152778316c9360e..417b9d6a41f97955c7b51065f6fdbeae67f75e85 100644
--- a/third_party/blink/renderer/core/frame/web_local_frame_impl.h
+++ b/third_party/blink/renderer/core/frame/web_local_frame_impl.h
@@ -162,6 +162,8 @@ class CORE_EXPORT WebLocalFrameImpl final
   v8::Local<v8::Context> MainWorldScriptContext() const override;
   int32_t GetScriptContextWorldId(
       v8::Local<v8::Context> script_context) const override;
+  v8::Local<v8::Context> WorldScriptContext(
+      v8::Isolate* isolate, int world_id) const override;
   void RequestExecuteScriptAndReturnValue(const WebScriptSource&,
                                           bool user_gesture,
                                           WebScriptExecutionCallback*) override;