Fix more type issues from the npapi.h tranisition to *_t types

third_party/npapi/bindings/npapi_extensions.h

 /* Copyright (c) 2006-2009 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.
  */
 
 #ifndef _NP_EXTENSIONS_H_
 #define _NP_EXTENSIONS_H_
 
 // Use the shorter include path here so that this file can be used in non-
 // Chromium projects, such as the Native Client SDK.
 #include "npapi.h"
 
+#include <stddef.h>         // For size_t
+
 /*
  * A fake "enum" value for getting browser-implemented Pepper extensions.
  * The variable returns a pointer to an NPNExtensions structure. */
 #define NPNVPepperExtensions ((NPNVariable) 4000)
 
 /*
  * A fake "enum" value for getting plugin-implemented Pepper extensions.
  * The variable returns a pointer to an NPPExtensions structure. */
 #define NPPVPepperExtensions ((NPPVariable) 4001)
 
@@ skipping 939 matching lines @@
 
 typedef struct _NPPExtensions {
   NPPGetPrintExtensionsPtr getPrintExtensions;
   NPPGetFindExtensionsPtr getFindExtensions;
   NPPZoomPtr zoom;
   NPPWidgetPropertyChangedPtr widgetPropertyChanged;
   NPPCopyPtr copy;
 } NPPExtensions;
 
 #endif  /* _NP_EXTENSIONS_H_ */