Adds support for the <keygen> tag for client certificate enrollment...

chrome/common/render_messages_internal.h

Index: chrome/common/render_messages_internal.h
===================================================================
--- chrome/common/render_messages_internal.h	(revision 29898)
+++ chrome/common/render_messages_internal.h	(working copy)
@@ -1923,4 +1923,17 @@
   IPC_MESSAGE_CONTROL1(ViewHostMsg_SocketStream_Close,
                        int /* socket_id */)
 
+  //---------------------------------------------------------------------------
+  // Request for cryptographic operation messages:
+  // These are messages from the renderer to the browser to perform a
+  // cryptographic operation.
+
+  // Asks the browser process to generate a keypair for grabbing a client
+  // certificate from a CA (<keygen> tag), and returns the signed public
+  // key and challenge string.
+  IPC_SYNC_MESSAGE_CONTROL3_1(ViewHostMsg_Keygen,
+                              uint32 /* key size index */,
+                              std::string /* challenge string */,
+                              GURL /* URL of requestor */,
+                              std::string /* signed public key and challenge */)
 IPC_END_MESSAGES(ViewHost)