[NaCl SDK] nacl_io: Add new fakes

native_client_sdk/src/tests/nacl_io_test/fake_messaging_interface.cc

+// Copyright (c) 2014 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 "fake_messaging_interface.h"
+
+#include "fake_var_manager.h"
+
+FakeMessagingInterface::FakeMessagingInterface(
+    FakeVarManager* manager, nacl_io::VarInterface* var_interface)
+    : manager_(manager), var_interface_(var_interface) {}
+
+FakeMessagingInterface::~FakeMessagingInterface() {
+  for (std::vector<PP_Var>::iterator it = messages.begin();
+       it != messages.end(); ++it) {
+    manager_->Release(*it);
+  }
+  messages.clear();
+}
+
+void FakeMessagingInterface::PostMessage(PP_Instance instance,
+                                         PP_Var message) {
+  manager_->AddRef(message);
+  messages.push_back(message);
+}