Add the PPAPI X509 Certificate interface and implementation.

ppapi/thunk/ppb_flash_x509_certificate_api.h

Index: ppapi/thunk/ppb_flash_x509_certificate_api.h
diff --git a/ppapi/thunk/ppb_flash_x509_certificate_api.h b/ppapi/thunk/ppb_flash_x509_certificate_api.h
new file mode 100644
index 0000000000000000000000000000000000000000..27aa634b891b5a6b9ce72b52da93f36f25a4d855
--- /dev/null
+++ b/ppapi/thunk/ppb_flash_x509_certificate_api.h
@@ -0,0 +1,25 @@
+// 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_PPB_FLASH_X509_CERTIFICATE_API_H_
+#define PPAPI_THUNK_PPB_FLASH_X509_CERTIFICATE_API_H_
+
+#include "ppapi/c/private/ppb_flash_x509_certificate.h"
+#include "ppapi/thunk/ppapi_thunk_export.h"
+
+namespace ppapi {
+namespace thunk {
+
+class PPAPI_THUNK_EXPORT PPB_Flash_X509Certificate_API {
+ public:
+  virtual ~PPB_Flash_X509Certificate_API() {}
+
+  virtual PP_Bool Initialize(const char* bytes, uint32_t length) = 0;
+  virtual PP_Var GetField(PP_Flash_X509Certificate_Field field) = 0;
+};
+
+}  // namespace thunk
+}  // namespace ppapi
+
+#endif  // PPAPI_THUNK_PPB_FLASH_X509_CERTIFICATE_API_H_