Fix "unused variable" warnings.

extensions/renderer/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/renderer/dispatcher.h"
 
 #include <stddef.h>
 
 #include <memory>
 #include <utility>
@@ skipping 208 matching lines @@
   if (set_idle_notifications_) {
     RenderThread::Get()->SetIdleNotificationDelayInMs(
         kInitialExtensionIdleHandlerDelayMs);
   }
 
   script_context_set_.reset(new ScriptContextSet(&active_extension_ids_));
   user_script_set_manager_.reset(new UserScriptSetManager());
   script_injection_manager_.reset(
       new ScriptInjectionManager(user_script_set_manager_.get()));
   user_script_set_manager_observer_.Add(user_script_set_manager_.get());
-  request_sender_.reset(new RequestSender(this));
+  request_sender_.reset(new RequestSender());
   PopulateSourceMap();
   WakeEventPage::Get()->Init(RenderThread::Get());
 
   RenderThread::Get()->RegisterExtension(SafeBuiltins::CreateV8Extension());
 
   // WebSecurityPolicy whitelists. They should be registered for both
   // chrome-extension: and chrome-extension-resource.
   using RegisterFunction = void (*)(const WebString&);
   RegisterFunction register_functions[] = {
       // Treat as secure because communication with them is entirely in the
@@ skipping 1362 matching lines @@
   // The "guestViewDeny" module must always be loaded last. It registers
   // error-providing custom elements for the GuestView types that are not
   // available, and thus all of those types must have been checked and loaded
   // (or not loaded) beforehand.
   if (context_type == Feature::BLESSED_EXTENSION_CONTEXT) {
     module_system->Require("guestViewDeny");
   }
 }
 
 }  // namespace extensions