PPAPI: Force async callback invocation option.

ppapi/thunk/ppb_graphics_2d_thunk.cc

 // Copyright (c) 2011 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/c/ppb_graphics_2d.h"
+#include "ppapi/thunk/common.h"
 #include "ppapi/thunk/enter.h"
 #include "ppapi/thunk/ppb_graphics_2d_api.h"
 #include "ppapi/thunk/resource_creation_api.h"
 
 namespace ppapi {
 namespace thunk {
 
 namespace {
 
 PP_Resource Create(PP_Instance instance,
@@ skipping 46 matching lines @@
   EnterResource<PPB_Graphics2D_API> enter(graphics_2d, true);
   if (enter.failed())
     return;
   enter.object()->ReplaceContents(image_data);
 }
 
 int32_t Flush(PP_Resource graphics_2d,
               PP_CompletionCallback callback) {
   EnterResource<PPB_Graphics2D_API> enter(graphics_2d, true);
   if (enter.failed())
-    return PP_ERROR_BADRESOURCE;
-  return enter.object()->Flush(callback);
+    return MayForceCallback(callback, PP_ERROR_BADRESOURCE);
+  int32_t result = enter.object()->Flush(callback);
+  return MayForceCallback(callback, result);
 }
 
 const PPB_Graphics2D g_ppb_graphics_2d_thunk = {
   &Create,
   &IsGraphics2D,
   &Describe,
   &PaintImageData,
   &Scroll,
   &ReplaceContents,
   &Flush
 };
 
 }  // namespace
 
 const PPB_Graphics2D* GetPPB_Graphics2D_Thunk() {
   return &g_ppb_graphics_2d_thunk;
 }
 
 }  // namespace thunk
 }  // namespace ppapi