Add ref count to service workers for extension API.

extensions/browser/extension_function.cc

Index: extensions/browser/extension_function.cc
diff --git a/extensions/browser/extension_function.cc b/extensions/browser/extension_function.cc
index 8f737df200df1c93f460422afb50ebb1464137aa..d716ceb132ba763ac74df97f43a99c1e8b76ceb5 100644
--- a/extensions/browser/extension_function.cc
+++ b/extensions/browser/extension_function.cc
@@ -468,11 +468,15 @@ UIThreadExtensionFunction::UIThreadExtensionFunction()
     : context_(nullptr),
       render_frame_host_(nullptr),
       is_from_service_worker_(false),
+      embedded_worker_id_(-1),
       delegate_(nullptr) {}
 
 UIThreadExtensionFunction::~UIThreadExtensionFunction() {
-  if (dispatcher() && render_frame_host())
-    dispatcher()->OnExtensionFunctionCompleted(extension());
+  if (dispatcher() && (render_frame_host() || is_from_service_worker_)) {
+    dispatcher()->OnExtensionFunctionCompleted(extension(),
+                                               embedded_worker_id_);
+  }
+
   // The extension function should always respond to avoid leaks in the
   // renderer, dangling callbacks, etc. The exception is if the system is
   // shutting down.