Revert "Move the NPAPI files from webkit/glue/plugins to webkit/plugins/npapi"

webkit/glue/plugins/webplugin_file_delegate.cc

 // Copyright (c) 2010 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 "webkit/plugins/npapi/webplugin_file_delegate.h"
+#include "webkit/glue/plugins/webplugin_file_delegate.h"
 
-namespace webkit {
-namespace npapi {
+namespace webkit_glue {
 
 bool WebPluginFileDelegate::ChooseFile(const char* mime_types,
                                        int mode,
                                        NPChooseFileCallback callback,
                                        void* user_data) {
   return false;
 }
 
-}  // namespace npapi
-}  // namespace webkit
+}  // namespace webkit_glue