Add the PPAPI X509 Certificate interface and implementation.

webkit/plugins/ppapi/mock_plugin_delegate.h

Index: webkit/plugins/ppapi/mock_plugin_delegate.h
diff --git a/webkit/plugins/ppapi/mock_plugin_delegate.h b/webkit/plugins/ppapi/mock_plugin_delegate.h
index d20b05e2894a76802a1981e0de3ab66564b8c60a..c506837b26a2bcf650bfc7df786b7ec13b45b799 100644
--- a/webkit/plugins/ppapi/mock_plugin_delegate.h
+++ b/webkit/plugins/ppapi/mock_plugin_delegate.h
@@ -8,6 +8,7 @@
 #include "webkit/plugins/ppapi/plugin_delegate.h"
 
 struct PP_NetAddress_Private;
+namespace ppapi { class PPB_X509Certificate_Fields; }
 namespace webkit_glue { class ClipboardClient; }
 
 namespace webkit {
@@ -149,6 +150,10 @@ class MockPluginDelegate : public PluginDelegate {
       webkit_glue::NetworkListObserver* observer) OVERRIDE;
   virtual void RemoveNetworkListObserver(
       webkit_glue::NetworkListObserver* observer) OVERRIDE;
+  virtual bool X509CertificateParseDER(
+      const std::vector<char>& der,
+      ::ppapi::PPB_X509Certificate_Fields* fields);
+
   virtual int32_t ShowContextMenu(
       PluginInstance* instance,
       webkit::ppapi::PPB_Flash_Menu_Impl* menu,