Remove a bunch of TOOLKIT_GTK in content/ and gpu/, as well as NPAPI plugins on linux

content/shell/browser/shell_resource_dispatcher_host_delegate.cc

 // Copyright 2013 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 "content/shell/browser/shell_resource_dispatcher_host_delegate.h"
 
 #include "base/command_line.h"
 #include "content/shell/browser/shell_login_dialog.h"
 #include "content/shell/common/shell_switches.h"
 
@@ skipping 10 matching lines @@
     net::AuthChallengeInfo* auth_info, net::URLRequest* request) {
   if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kDumpRenderTree))
     return NULL;
 
   if (!login_request_callback_.is_null()) {
     login_request_callback_.Run();
     login_request_callback_.Reset();
     return NULL;
   }
 
-#if !defined(OS_MACOSX) && !defined(TOOLKIT_GTK)
+#if !defined(OS_MACOSX)
 // TODO: implement ShellLoginDialog for other platforms, drop this #if
   return NULL;
 #else
   return new ShellLoginDialog(auth_info, request);
 #endif
 }
 
 }  // namespace content