Add the PPAPI X509 Certificate interface and implementation.

content/browser/renderer_host/pepper_tcp_socket.h

Index: content/browser/renderer_host/pepper_tcp_socket.h
diff --git a/content/browser/renderer_host/pepper_tcp_socket.h b/content/browser/renderer_host/pepper_tcp_socket.h
index af1b6ed610db9766cbbdcae37be3832f2a3149df..3539748b35d7483527f9ccb64d7fe74ce5cb4348 100644
--- a/content/browser/renderer_host/pepper_tcp_socket.h
+++ b/content/browser/renderer_host/pepper_tcp_socket.h
@@ -15,6 +15,10 @@
 #include "net/base/completion_callback.h"
 #include "ppapi/c/pp_stdint.h"
 
+namespace ppapi {
+class PPB_X509Certificate_Fields;
+}
+
 class PepperMessageFilter;
 struct PP_NetAddress_Private;
 
@@ -22,6 +26,7 @@ namespace net {
 class IOBuffer;
 class SingleRequestHostResolver;
 class StreamSocket;
+class X509Certificate;
 }
 
 // PepperTCPSocket is used by PepperMessageFilter to handle requests from
@@ -52,6 +57,16 @@ class PepperTCPSocket {
 
   void SendConnectACKError();
 
+  // Extracts the certificate field data from a |net::X509Certificate| into
+  // |PPB_X509Certificate_Fields|.
+  static bool GetCertificateFields(const net::X509Certificate& cert,
+                                   ppapi::PPB_X509Certificate_Fields* fields);
+  // Extracts the certificate field data from the DER representation of a
+  // certificate into |PPB_X509Certificate_Fields|.
+  static bool GetCertificateFields(const char* der,
+                                   uint32_t length,
+                                   ppapi::PPB_X509Certificate_Fields* fields);
+
  private:
   enum ConnectionState {
     // Before a connection is successfully established (including a previous