PPAPI: Force async callback invocation option.

ppapi/thunk/ppb_file_io_trusted_thunk.cc

Index: ppapi/thunk/ppb_file_io_trusted_thunk.cc
===================================================================
--- ppapi/thunk/ppb_file_io_trusted_thunk.cc	(revision 91178)
+++ ppapi/thunk/ppb_file_io_trusted_thunk.cc	(working copy)
@@ -5,8 +5,9 @@
 #include "ppapi/c/dev/ppb_file_io_trusted_dev.h"
 #include "ppapi/c/pp_completion_callback.h"
 #include "ppapi/c/pp_errors.h"
+#include "ppapi/thunk/common.h"
+#include "ppapi/thunk/enter.h"
 #include "ppapi/thunk/thunk.h"
-#include "ppapi/thunk/enter.h"
 #include "ppapi/thunk/ppb_file_io_api.h"
 #include "ppapi/thunk/resource_creation_api.h"
 
@@ -28,8 +29,9 @@
                   PP_CompletionCallback callback) {
   EnterResource<PPB_FileIO_API> enter(file_io, true);
   if (enter.failed())
-    return PP_ERROR_BADRESOURCE;
-  return enter.object()->WillWrite(offset, bytes_to_write, callback);
+    return MayForceCallback(callback, PP_ERROR_BADRESOURCE);
+  int32_t result =  enter.object()->WillWrite(offset, bytes_to_write, callback);
+  return MayForceCallback(callback, result);
 }
 
 int32_t WillSetLength(PP_Resource file_io,
@@ -37,8 +39,9 @@
                       PP_CompletionCallback callback) {
   EnterResource<PPB_FileIO_API> enter(file_io, true);
   if (enter.failed())
-    return PP_ERROR_BADRESOURCE;
-  return enter.object()->WillSetLength(length, callback);
+    return MayForceCallback(callback, PP_ERROR_BADRESOURCE);
+  int32_t result = enter.object()->WillSetLength(length, callback);
+  return MayForceCallback(callback, result);
 }
 
 const PPB_FileIOTrusted_Dev g_ppb_file_io_trusted_thunk = {