PPAPI: Make blocking completion callbacks work.

ppapi/thunk/ppb_file_io_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/pp_completion_callback.h"
 #include "ppapi/c/pp_errors.h"
 #include "ppapi/thunk/enter.h"
 #include "ppapi/thunk/thunk.h"
 #include "ppapi/thunk/ppb_file_io_api.h"
 #include "ppapi/thunk/resource_creation_api.h"
@@ skipping 17 matching lines @@
   return PP_FromBool(enter.succeeded());
 }
 
 int32_t Open(PP_Resource file_io,
              PP_Resource file_ref,
              int32_t open_flags,
              PP_CompletionCallback callback) {
   EnterFileIO enter(file_io, callback, true);
   if (enter.failed())
     return enter.retval();
-  return enter.SetResult(enter.object()->Open(file_ref, open_flags, callback));
+  return enter.SetResult(enter.object()->Open(file_ref, open_flags,
+                         enter.callback()));
 }
 
 int32_t Query(PP_Resource file_io,
               PP_FileInfo* info,
               PP_CompletionCallback callback) {
   EnterFileIO enter(file_io, callback, true);
   if (enter.failed())
     return enter.retval();
-  return enter.SetResult(enter.object()->Query(info, callback));
+  return enter.SetResult(enter.object()->Query(info, enter.callback()));
 }
 
 int32_t Touch(PP_Resource file_io,
               PP_Time last_access_time,
               PP_Time last_modified_time,
               PP_CompletionCallback callback) {
   EnterFileIO enter(file_io, callback, true);
   if (enter.failed())
     return enter.retval();
   return enter.SetResult(enter.object()->Touch(
-      last_access_time, last_modified_time, callback));
+      last_access_time, last_modified_time, enter.callback()));
 }
 
 int32_t Read(PP_Resource file_io,
              int64_t offset,
              char* buffer,
              int32_t bytes_to_read,
              PP_CompletionCallback callback) {
   EnterFileIO enter(file_io, callback, true);
   if (enter.failed())
     return enter.retval();
   return enter.SetResult(enter.object()->Read(offset, buffer, bytes_to_read,
-                                              callback));
+                                              enter.callback()));
 }
 
 int32_t Write(PP_Resource file_io,
               int64_t offset,
               const char* buffer,
               int32_t bytes_to_write,
               PP_CompletionCallback callback) {
   EnterFileIO enter(file_io, callback, true);
   if (enter.failed())
     return enter.retval();
   return enter.SetResult(enter.object()->Write(offset, buffer, bytes_to_write,
-                                               callback));
+                                               enter.callback()));
 }
 
 int32_t SetLength(PP_Resource file_io,
                   int64_t length,
                   PP_CompletionCallback callback) {
   EnterFileIO enter(file_io, callback, true);
   if (enter.failed())
     return enter.retval();
-  return enter.SetResult(enter.object()->SetLength(length, callback));
+  return enter.SetResult(enter.object()->SetLength(length, enter.callback()));
 }
 
 int32_t Flush(PP_Resource file_io,
               PP_CompletionCallback callback) {
   EnterFileIO enter(file_io, callback, true);
   if (enter.failed())
     return enter.retval();
-  return enter.SetResult(enter.object()->Flush(callback));
+  return enter.SetResult(enter.object()->Flush(enter.callback()));
 }
 
 void Close(PP_Resource file_io) {
   EnterFileIO enter(file_io, true);
   if (enter.succeeded())
     enter.object()->Close();
 }
 
 const PPB_FileIO g_ppb_file_io_thunk = {
   &Create,
   &IsFileIO,
   &Open,
   &Query,
   &Touch,
   &Read,
   &Write,
   &SetLength,
   &Flush,
   &Close
 };
 
 }  // namespace
 
 const PPB_FileIO_1_0* GetPPB_FileIO_1_0_Thunk() {
   return &g_ppb_file_io_thunk;
 }
 
 }  // namespace thunk
 }  // namespace ppapi