PPAPI: Force async callback invocation option.

ppapi/proxy/ppb_flash_menu_proxy.cc

Index: ppapi/proxy/ppb_flash_menu_proxy.cc
===================================================================
--- ppapi/proxy/ppb_flash_menu_proxy.cc	(revision 88104)
+++ ppapi/proxy/ppb_flash_menu_proxy.cc	(working copy)
@@ -7,6 +7,7 @@
 #include "ppapi/c/pp_errors.h"
 #include "ppapi/c/private/ppb_flash_menu.h"
 #include "ppapi/proxy/ppapi_messages.h"
+#include "ppapi/thunk/common.h"
 
 namespace pp {
 namespace proxy {
@@ -68,14 +69,14 @@
              PP_CompletionCallback callback) {
   FlashMenu* object = PluginResource::GetAs<FlashMenu>(menu_id);
   if (!object)
-    return PP_ERROR_BADRESOURCE;
+    return ppapi::thunk::MayForceCallback(callback, PP_ERROR_BADRESOURCE);
   PluginDispatcher* dispatcher = PluginDispatcher::GetForInstance(
       object->instance());
   if (!dispatcher)
-    return PP_ERROR_FAILED;
+    return ppapi::thunk::MayForceCallback(callback, PP_ERROR_FAILED);
 
   if (object->callback().func)
-    return PP_ERROR_INPROGRESS;
+    return ppapi::thunk::MayForceCallback(callback, PP_ERROR_INPROGRESS);
 
   object->set_selected_id_ptr(selected_id);
   object->set_callback(callback);