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

ppapi/c/ppb_instance.h

Index: ppapi/c/ppb_instance.h
diff --git a/ppapi/c/ppb_instance.h b/ppapi/c/ppb_instance.h
index 6ad468788c6db44283ee26c3ee7296752c04f524..522abace5e4200812cef0415861f8a5d7b9ff661 100644
--- a/ppapi/c/ppb_instance.h
+++ b/ppapi/c/ppb_instance.h
@@ -3,7 +3,7 @@
  * found in the LICENSE file.
  */
 
-/* From ppb_instance.idl modified Tue Aug 23 11:25:50 2011. */
+/* From ppb_instance.idl modified Wed Oct  5 14:06:02 2011. */
 
 #ifndef PPAPI_C_PPB_INSTANCE_H_
 #define PPAPI_C_PPB_INSTANCE_H_
@@ -35,7 +35,7 @@
  * The PPB_Instance interface contains pointers to functions
  * related to the module instance on a web page.
  */
-struct PPB_Instance {
+struct PPB_Instance_1_0 {
   /**
    * BindGraphics() binds the given graphics as the current display surface.
    * The contents of this device is what will be displayed in the instance's
@@ -79,6 +79,8 @@ struct PPB_Instance {
   PP_Bool (*IsFullFrame)(PP_Instance instance);
 };
 
+typedef struct PPB_Instance_1_0 PPB_Instance;
+
 struct PPB_Instance_0_5 {
   struct PP_Var (*GetWindowObject)(PP_Instance instance);
   struct PP_Var (*GetOwnerElementObject)(PP_Instance instance);