Pepper/Flapper: Add an interface to do sync file ops on FileRefs.

webkit/plugins/ppapi/ppb_flash_file_impl.h

Index: webkit/plugins/ppapi/ppb_flash_file_impl.h
diff --git a/webkit/plugins/ppapi/ppb_flash_file_impl.h b/webkit/plugins/ppapi/ppb_flash_file_impl.h
index 2de7512dce1dec92a21f10b3cd546cd29bf8e03d..ddfba9d159a6b7fa984a3d4b7f269f61ab8b7ecd 100644
--- a/webkit/plugins/ppapi/ppb_flash_file_impl.h
+++ b/webkit/plugins/ppapi/ppb_flash_file_impl.h
@@ -5,6 +5,7 @@
 #ifndef WEBKIT_PLUGINS_PPAPI_PPB_FLASH_FILE_IMPL_H_
 #define WEBKIT_PLUGINS_PPAPI_PPB_FLASH_FILE_IMPL_H_
 
+struct PPB_Flash_File_FileRef;
 struct PPB_Flash_File_ModuleLocal;
 
 namespace webkit {
@@ -15,6 +16,11 @@ class PPB_Flash_File_ModuleLocal_Impl {
   static const PPB_Flash_File_ModuleLocal* GetInterface();
 };
 
+class PPB_Flash_File_FileRef_Impl {
+ public:
+  static const PPB_Flash_File_FileRef* GetInterface();
+};
+
 }  // namespace ppapi
 }  // namespace webkit