Clear UIThreadExtensionFunction::render_frame_host_ when RFH is gone.

extensions/browser/extension_function_dispatcher.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "extensions/browser/extension_function_dispatcher.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/json/json_string_value_serializer.h"
@@ skipping 473 matching lines @@
       ExtensionAPI::GetSharedInstance(), browser_context_, callback));
   if (!function.get())
     return;
 
   UIThreadExtensionFunction* function_ui =
       function->AsUIThreadExtensionFunction();
   if (!function_ui) {
     NOTREACHED();
     return;
   }
-  function_ui->SetRenderFrameHost(render_frame_host);
+  if (params.embedded_worker_id != -1) {
+    function_ui->set_is_from_service_worker(true);
+  } else {
+    function_ui->SetRenderFrameHost(render_frame_host);
+  }
   function_ui->set_dispatcher(AsWeakPtr());
   function_ui->set_browser_context(browser_context_);
   if (extension &&
       ExtensionsBrowserClient::Get()->CanExtensionCrossIncognito(
           extension, browser_context_)) {
     function->set_include_incognito(true);
   }
 
   if (!CheckPermissions(function.get(), params, callback))
     return;
@@ skipping 146 matching lines @@
 // static
 void ExtensionFunctionDispatcher::SendAccessDenied(
     const ExtensionFunction::ResponseCallback& callback,
     functions::HistogramValue histogram_value) {
   base::ListValue empty_list;
   callback.Run(ExtensionFunction::FAILED, empty_list,
                "Access to extension API denied.", histogram_value);
 }
 
 }  // namespace extensions