PPAPI: Make blocking completion callbacks work.

ppapi/thunk/ppb_file_chooser_thunk.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ppapi/c/dev/ppb_file_chooser_dev.h"
 #include "ppapi/c/pp_completion_callback.h"
 #include "ppapi/c/pp_errors.h"
 #include "ppapi/c/trusted/ppb_file_chooser_trusted.h"
 #include "ppapi/shared_impl/var.h"
 #include "ppapi/thunk/enter.h"
@@ skipping 20 matching lines @@
 
 PP_Bool IsFileChooser(PP_Resource resource) {
   EnterResource<PPB_FileChooser_API> enter(resource, false);
   return PP_FromBool(enter.succeeded());
 }
 
 int32_t Show0_5(PP_Resource chooser, PP_CompletionCallback callback) {
   EnterResource<PPB_FileChooser_API> enter(chooser, callback, true);
   if (enter.failed())
     return enter.retval();
-  return enter.SetResult(enter.object()->Show0_5(callback));
+  return enter.SetResult(enter.object()->Show0_5(enter.callback()));
 }
 
 PP_Resource GetNextChosenFile0_5(PP_Resource chooser) {
   EnterResource<PPB_FileChooser_API> enter(chooser, true);
   if (enter.failed())
     return 0;
   return enter.object()->GetNextChosenFile();
 }
 
 int32_t Show(PP_Resource chooser,
              PP_ArrayOutput output,
              PP_CompletionCallback callback) {
   EnterResource<PPB_FileChooser_API> enter(chooser, callback, true);
   if (enter.failed())
     return enter.retval();
-  return enter.SetResult(enter.object()->Show(output, callback));
+  return enter.SetResult(enter.object()->Show(output, enter.callback()));
 }
 
 int32_t ShowWithoutUserGesture0_5(PP_Resource chooser,
                                   PP_Bool save_as,
                                   PP_Var suggested_file_name,
                                   PP_CompletionCallback callback) {
   EnterResource<PPB_FileChooser_API> enter(chooser, callback, true);
   if (enter.failed())
     return enter.retval();
   return enter.SetResult(enter.object()->ShowWithoutUserGesture0_5(
-      save_as, suggested_file_name, callback));
+      save_as, suggested_file_name, enter.callback()));
 }
 
 int32_t ShowWithoutUserGesture0_6(PP_Resource chooser,
                                   PP_Bool save_as,
                                   PP_Var suggested_file_name,
                                   PP_ArrayOutput output,
                                   PP_CompletionCallback callback) {
   EnterResource<PPB_FileChooser_API> enter(chooser, callback, true);
   if (enter.failed())
     return enter.retval();
   return enter.SetResult(enter.object()->ShowWithoutUserGesture(
-      save_as, suggested_file_name, output, callback));
+      save_as, suggested_file_name, output, enter.callback()));
 }
 
 const PPB_FileChooser_Dev_0_5 g_ppb_file_chooser_0_5_thunk = {
   &Create,
   &IsFileChooser,
   &Show0_5,
   &GetNextChosenFile0_5
 };
 
 const PPB_FileChooser_Dev_0_6 g_ppb_file_chooser_0_6_thunk = {
@@ skipping 23 matching lines @@
 const PPB_FileChooserTrusted_0_5* GetPPB_FileChooserTrusted_0_5_Thunk() {
   return &g_ppb_file_chooser_trusted_0_5_thunk;
 }
 
 const PPB_FileChooserTrusted_0_6* GetPPB_FileChooserTrusted_0_6_Thunk() {
   return &g_ppb_file_chooser_trusted_0_6_thunk;
 }
 
 }  // namespace thunk
 }  // namespace ppapi