Update PPAPI IDL generator to define versioned structs, and unversioned typedef.

ppapi/c/dev/ppb_websocket_dev.h

Index: ppapi/c/dev/ppb_websocket_dev.h
diff --git a/ppapi/c/dev/ppb_websocket_dev.h b/ppapi/c/dev/ppb_websocket_dev.h
index 34bad3bfa05be7db34f7c0e58240109080d7d627..129af9c1ff07b45898d02fc2495ed3d6f258f5ea 100644
--- a/ppapi/c/dev/ppb_websocket_dev.h
+++ b/ppapi/c/dev/ppb_websocket_dev.h
@@ -3,7 +3,7 @@
  * found in the LICENSE file.
  */
 
-/* From dev/ppb_websocket_dev.idl modified Fri Dec 16 14:25:06 2011. */
+/* From dev/ppb_websocket_dev.idl modified Mon Dec 19 19:44:12 2011. */
 
 #ifndef PPAPI_C_DEV_PPB_WEBSOCKET_DEV_H_
 #define PPAPI_C_DEV_PPB_WEBSOCKET_DEV_H_
@@ -84,7 +84,7 @@ PP_COMPILE_ASSERT_SIZE_IN_BYTES(PP_WebSocketMessageType_Dev, 4);
  * @addtogroup Interfaces
  * @{
  */
-struct PPB_WebSocket_Dev {
+struct PPB_WebSocket_Dev_0_1 {
   /**
    * Create() creates a WebSocket instance.
    *
@@ -322,6 +322,8 @@ struct PPB_WebSocket_Dev {
    */
   struct PP_Var (*GetURL)(PP_Resource web_socket);
 };
+
+typedef struct PPB_WebSocket_Dev_0_1 PPB_WebSocket_Dev;
 /**
  * @}
  */