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

ppapi/c/private/ppb_flash.h

Index: ppapi/c/private/ppb_flash.h
diff --git a/ppapi/c/private/ppb_flash.h b/ppapi/c/private/ppb_flash.h
index d63b7919d69ddef5351e03bacbcd2496689e3cfb..a34d2dec63265b001325cfefca23147077bd5a19 100644
--- a/ppapi/c/private/ppb_flash.h
+++ b/ppapi/c/private/ppb_flash.h
@@ -3,7 +3,7 @@
  * found in the LICENSE file.
  */
 
-/* From private/ppb_flash.idl modified Thu Dec 15 10:30:29 2011. */
+/* From private/ppb_flash.idl modified Mon Dec 19 19:43:03 2011. */
 
 #ifndef PPAPI_C_PRIVATE_PPB_FLASH_H_
 #define PPAPI_C_PRIVATE_PPB_FLASH_H_
@@ -38,7 +38,7 @@
  * The <code>PPB_Flash</code> interface contains pointers to various functions
  * that are only needed to support Pepper Flash.
  */
-struct PPB_Flash {
+struct PPB_Flash_12_0 {
   /**
    * Sets or clears the rendering hint that the given plugin instance is always
    * on top of page content. Somewhat more optimized painting can be used in
@@ -108,6 +108,8 @@ struct PPB_Flash {
    */
   void (*PreloadFontWin)(const void* logfontw);
 };
+
+typedef struct PPB_Flash_12_0 PPB_Flash;
 /**
  * @}
  */