Add the PPAPI X509 Certificate interface and implementation.

ppapi/proxy/ppapi_messages.h

Index: ppapi/proxy/ppapi_messages.h
diff --git a/ppapi/proxy/ppapi_messages.h b/ppapi/proxy/ppapi_messages.h
index 1043f5990478ae7f9018002573bca9d22b440929..e897911520c1f3dd7d0898c0a22ba8d4d97b3046 100644
--- a/ppapi/proxy/ppapi_messages.h
+++ b/ppapi/proxy/ppapi_messages.h
@@ -44,6 +44,7 @@
 #include "ppapi/shared_impl/ppb_network_list_private_shared.h"
 #include "ppapi/shared_impl/ppb_url_request_info_shared.h"
 #include "ppapi/shared_impl/ppb_view_shared.h"
+#include "ppapi/shared_impl/private/ppb_flash_x509_certificate_shared.h"
 #include "ppapi/shared_impl/private/ppb_host_resolver_shared.h"
 
 #undef IPC_MESSAGE_EXPORT
@@ -1336,6 +1337,12 @@ IPC_MESSAGE_CONTROL2(PpapiHostMsg_PPBTCPServerSocket_Accept,
 IPC_MESSAGE_CONTROL1(PpapiHostMsg_PPBTCPServerSocket_Destroy,
                      uint32 /* socket_id */)
 
+// PPB_Flash_X509_Certificate
+IPC_SYNC_MESSAGE_CONTROL1_2(PpapiHostMsg_PPBX509Certificate_ParseDER,
+                            std::vector<char> /* der */,
+                            bool /* succeeded */,
+                            ppapi::PPB_X509Certificate_Fields /* result */)
+
 // PPB_Font.
 IPC_SYNC_MESSAGE_CONTROL0_1(PpapiHostMsg_PPBFont_GetFontFamilies,
                             std::string /* result */)