Fix "unused variable" warnings.

extensions/browser/api/networking_private/networking_private_linux.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/api/networking_private/networking_private_linux.h"
 
 #include <stddef.h>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/callback.h"
 #include "base/message_loop/message_loop.h"
 #include "base/strings/string16.h"
 #include "base/strings/string_split.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/threading/sequenced_worker_pool.h"
 #include "components/onc/onc_constants.h"
-#include "content/public/browser/browser_context.h"
 #include "content/public/browser/browser_thread.h"
 #include "dbus/bus.h"
 #include "dbus/message.h"
 #include "dbus/object_path.h"
 #include "dbus/object_proxy.h"
 #include "extensions/browser/api/networking_private/network_config_dbus_constants_linux.h"
 #include "extensions/browser/api/networking_private/networking_private_api.h"
 #include "extensions/browser/api/networking_private/networking_private_delegate_observer.h"
 
 ////////////////////////////////////////////////////////////////////////////////
@@ skipping 100 matching lines @@
   if (!error->empty()) {
     failure_callback.Run(*error);
     return;
   }
   success_callback.Run(std::move(properties));
 }
 
 }  // namespace
 
 NetworkingPrivateLinux::NetworkingPrivateLinux(
-    content::BrowserContext* browser_context,
     std::unique_ptr<VerifyDelegate> verify_delegate)
     : NetworkingPrivateDelegate(std::move(verify_delegate)),
-      browser_context_(browser_context),
       dbus_thread_("Networking Private DBus"),
       network_manager_proxy_(NULL) {
   base::Thread::Options thread_options(base::MessageLoop::Type::TYPE_IO, 0);
 
   dbus_thread_.StartWithOptions(thread_options);
   dbus_thread_.task_runner()->PostTask(
       FROM_HERE,
       base::Bind(&NetworkingPrivateLinux::Initialize, base::Unretained(this)));
 }
 
@@ skipping 1050 matching lines @@
                  base::Unretained(this), base::Passed(&guid_list)));
 }
 
 void NetworkingPrivateLinux::OnNetworksChangedEventTask(
     std::unique_ptr<GuidList> guid_list) {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
   OnNetworksChangedEventOnUIThread(*guid_list);
 }
 
 }  // namespace extensions