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

ppapi/thunk/ppb_flash_clipboard_thunk.cc

Index: ppapi/thunk/ppb_flash_clipboard_thunk.cc
diff --git a/ppapi/thunk/ppb_flash_clipboard_thunk.cc b/ppapi/thunk/ppb_flash_clipboard_thunk.cc
index 010aa2f8bb055a0026e2963d3ce81920bd054ada..bf70ba9b6400aa8d38d363e2cafff70bc689534b 100644
--- a/ppapi/thunk/ppb_flash_clipboard_thunk.cc
+++ b/ppapi/thunk/ppb_flash_clipboard_thunk.cc
@@ -49,7 +49,7 @@ const PPB_Flash_Clipboard g_ppb_flash_clipboard_thunk = {
 
 }  // namespace
 
-const PPB_Flash_Clipboard* GetPPB_Flash_Clipboard_Thunk() {
+const PPB_Flash_Clipboard_3_0* GetPPB_Flash_Clipboard_3_0_Thunk() {
   return &g_ppb_flash_clipboard_thunk;
 }