PPAPI: Make blocking completion callbacks work.

ppapi/thunk/ppb_host_resolver_private_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_var.h"
 #include "ppapi/c/private/ppb_host_resolver_private.h"
 #include "ppapi/thunk/enter.h"
 #include "ppapi/thunk/ppb_host_resolver_private_api.h"
 #include "ppapi/thunk/resource_creation_api.h"
 #include "ppapi/thunk/thunk.h"
@@ skipping 18 matching lines @@
 }
 
 int32_t Resolve(PP_Resource host_resolver,
                 const char* host,
                 uint16_t port,
                 const PP_HostResolver_Private_Hint* hint,
                 PP_CompletionCallback callback) {
   EnterHostResolver enter(host_resolver, callback, true);
   if (enter.failed())
     return enter.retval();
-  return enter.SetResult(enter.object()->Resolve(host, port, hint, callback));
+  return enter.SetResult(enter.object()->Resolve(host, port, hint,
+                                                 enter.callback()));
 }
 
 PP_Var GetCanonicalName(PP_Resource host_resolver) {
   EnterHostResolver enter(host_resolver, true);
   if (enter.failed())
     return PP_MakeUndefined();
   return enter.object()->GetCanonicalName();
 }
 
 uint32_t GetSize(PP_Resource host_resolver) {
@@ skipping 22 matching lines @@
 };
 
 }  // namespace
 
 const PPB_HostResolver_Private_0_1* GetPPB_HostResolver_Private_0_1_Thunk() {
   return &g_ppb_host_resolver_thunk;
 }
 
 }  // namespace thunk
 }  // namespace ppapi