Add the PPAPI X509 Certificate interface and implementation.

ppapi/thunk/resource_creation_api.h

 // Copyright (c) 2012 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 PPAPI_THUNK_RESOURCE_CREATION_API_H_
 #define PPAPI_THUNK_RESOURCE_CREATION_API_H_
 
 #include "ppapi/c/dev/ppb_audio_input_dev.h"
 #include "ppapi/c/dev/ppb_file_chooser_dev.h"
 #include "ppapi/c/dev/ppb_video_layer_dev.h"
@@ skipping 121 matching lines @@
   virtual PP_Resource CreateVideoLayer(PP_Instance instance,
                                        PP_VideoLayerMode_Dev mode) = 0;
   virtual PP_Resource CreateWebSocket(PP_Instance instance) = 0;
   virtual PP_Resource CreateWheelInputEvent(
       PP_Instance instance,
       PP_TimeTicks time_stamp,
       uint32_t modifiers,
       const PP_FloatPoint* wheel_delta,
       const PP_FloatPoint* wheel_ticks,
       PP_Bool scroll_by_page) = 0;
+  virtual PP_Resource CreateX509CertificatePrivate(PP_Instance instance) = 0;
 
   static const ApiID kApiID = API_ID_RESOURCE_CREATION;
 };
 
 }  // namespace thunk
 }  // namespace ppapi
 
 #endif  // PPAPI_THUNK_RESOURCE_CREATION_API_H_