Add ref count to service workers for extension API.

extensions/browser/extension_function_dispatcher.h

Index: extensions/browser/extension_function_dispatcher.h
diff --git a/extensions/browser/extension_function_dispatcher.h b/extensions/browser/extension_function_dispatcher.h
index 074c2411204ada94ce49fb7de24f92e7d78cccee..9aa833f45edee0bc8e2c14e663fb32744226ce8b 100644
--- a/extensions/browser/extension_function_dispatcher.h
+++ b/extensions/browser/extension_function_dispatcher.h
@@ -101,7 +101,8 @@ class ExtensionFunctionDispatcher
 
   // Called when an ExtensionFunction is done executing, after it has sent
   // a response (if any) to the extension.
-  void OnExtensionFunctionCompleted(const Extension* extension);
+  void OnExtensionFunctionCompleted(const Extension* extension,
+                                    bool is_from_service_worker);
 
   // See the Delegate class for documentation on these methods.
   // TODO(devlin): None of these belong here. We should kill