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

ppapi/c/ppb_var.h

Index: ppapi/c/ppb_var.h
diff --git a/ppapi/c/ppb_var.h b/ppapi/c/ppb_var.h
index 3e6e4818d490471392163faa3c1c3e8a40664435..16db50500350f0246abe29b2fd31f2d5324f1467 100644
--- a/ppapi/c/ppb_var.h
+++ b/ppapi/c/ppb_var.h
@@ -3,7 +3,7 @@
  * found in the LICENSE file.
  */
 
-/* From ppb_var.idl modified Tue Dec  6 11:26:58 2011. */
+/* From ppb_var.idl modified Wed Dec 14 18:08:00 2011. */
 
 #ifndef PPAPI_C_PPB_VAR_H_
 #define PPAPI_C_PPB_VAR_H_
@@ -31,7 +31,7 @@
 /**
  * PPB_Var API
  */
-struct PPB_Var {
+struct PPB_Var_1_1 {
   /**
    * AddRef() adds a reference to the given var. If this is not a refcounted
    * object, this function will do nothing so you can always call it no matter
@@ -95,6 +95,8 @@ struct PPB_Var {
   const char* (*VarToUtf8)(struct PP_Var var, uint32_t* len);
 };
 
+typedef struct PPB_Var_1_1 PPB_Var;
+
 struct PPB_Var_1_0 {
   void (*AddRef)(struct PP_Var var);
   void (*Release)(struct PP_Var var);