[NaCl SDK] nacl_io: opening a node immediately after mounting would fail.

native_client_sdk/src/libraries/nacl_io/real_pepper_interface.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 "nacl_io/real_pepper_interface.h"
 #include <assert.h>
 #include <stdio.h>
 
 #include <ppapi/c/pp_errors.h>
@@ skipping 86 matching lines @@
 void RealPepperInterface::AddRefResource(PP_Resource resource) {
   if (resource)
     core_interface_->AddRefResource(resource);
 }
 
 void RealPepperInterface::ReleaseResource(PP_Resource resource) {
   if (resource)
     core_interface_->ReleaseResource(resource);
 }
 
+bool RealPepperInterface::IsMainThread() {
+  return core_interface_->IsMainThread();
+}
+
 // Define getter function.
 #include "nacl_io/pepper/undef_macros.h"
 #include "nacl_io/pepper/define_empty_macros.h"
 #undef BEGIN_INTERFACE
 #define BEGIN_INTERFACE(BaseClass, PPInterface, InterfaceString) \
     BaseClass* RealPepperInterface::Get##BaseClass() { \
       return BaseClass##interface_; \
     }
 #include "nacl_io/pepper/all_interfaces.h"
 
 
 int32_t RealPepperInterface::InitializeMessageLoop() {
   int32_t result;
   PP_Resource message_loop = 0;
   if (core_interface_->IsMainThread()) {
     // TODO(binji): Spin up the main thread's ppapi work thread.
     assert(0);
   } else {
     message_loop = message_loop_interface_->GetCurrent();
     if (!message_loop) {
       message_loop = message_loop_interface_->Create(instance_);
       result = message_loop_interface_->AttachToCurrentThread(message_loop);
       assert(result == PP_OK);
     }
   }
 
   return PP_OK;
 }