Expose distiller functions to JavaScript

content/renderer/dom_automation_controller.cc

Index: content/renderer/dom_automation_controller.cc
diff --git a/content/renderer/dom_automation_controller.cc b/content/renderer/dom_automation_controller.cc
index da6907202083d8144151b72d7f728b90485613ce..2443022910b0196f38282ba2537d5483512f64b6 100644
--- a/content/renderer/dom_automation_controller.cc
+++ b/content/renderer/dom_automation_controller.cc
@@ -58,6 +58,29 @@ gin::ObjectTemplateBuilder DomAutomationController::GetObjectTemplateBuilder(
 
 void DomAutomationController::OnDestruct() {}
 
+void DomAutomationController::DidCreateScriptContext(
+    v8::Local<v8::Context> context,
+    int extension_group,
+    int world_id) {
+  // Add the domAutomationController to isolated worlds as well.
+  v8::Isolate* isolate = blink::mainThreadIsolate();
+  v8::HandleScope handle_scope(isolate);
+  if (context.IsEmpty())
+    return;
+
+  v8::Context::Scope context_scope(context);
+
+  // Resuse this object instead of creating others.
+  gin::Handle<DomAutomationController> controller =
+      gin::CreateHandle(isolate, this);
+  if (controller.IsEmpty())
+    return;
+
+  v8::Local<v8::Object> global = context->Global();
+  global->Set(gin::StringToV8(isolate, "domAutomationController"),
+              controller.ToV8());
+}
+
 bool DomAutomationController::SendMsg(const gin::Arguments& args) {
   if (!render_frame())
     return false;