Add the PPAPI X509 Certificate interface and implementation.

webkit/plugins/ppapi/plugin_delegate.h

Index: webkit/plugins/ppapi/plugin_delegate.h
diff --git a/webkit/plugins/ppapi/plugin_delegate.h b/webkit/plugins/ppapi/plugin_delegate.h
index 8b6f4434271b7348c64645fc892bb36a4d23d6cb..c8bd427b9babfa460364cece0cc213da9cd88d8e 100644
--- a/webkit/plugins/ppapi/plugin_delegate.h
+++ b/webkit/plugins/ppapi/plugin_delegate.h
@@ -56,6 +56,7 @@ class CommandBuffer;
 
 namespace ppapi {
 class PPB_HostResolver_Shared;
+class PPB_X509Certificate_Fields;
 struct DeviceRefData;
 struct HostPortPair;
 struct Preferences;
@@ -522,6 +523,11 @@ class PluginDelegate {
   virtual void RemoveNetworkListObserver(
       webkit_glue::NetworkListObserver* observer) = 0;
 
+  // For PPB_X509Certificate_Private.
+  virtual bool X509CertificateParseDER(
+      const std::vector<char>& der,
+      ::ppapi::PPB_X509Certificate_Fields* fields) = 0;
+
   // Show the given context menu at the given position (in the plugin's
   // coordinates).
   virtual int32_t ShowContextMenu(