chromeos: Update update_engine D-Bus availability code.

chromeos/dbus/update_engine_client.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 "chromeos/dbus/update_engine_client.h"
 
 #include <stdint.h>
 
 #include <algorithm>
 
@@ skipping 213 matching lines @@
         update_engine::kUpdateEngineServiceName,
         dbus::ObjectPath(update_engine::kUpdateEngineServicePath));
     update_engine_proxy_->ConnectToSignal(
         update_engine::kUpdateEngineInterface,
         update_engine::kStatusUpdate,
         base::Bind(&UpdateEngineClientImpl::StatusUpdateReceived,
                    weak_ptr_factory_.GetWeakPtr()),
         base::Bind(&UpdateEngineClientImpl::StatusUpdateConnected,
                    weak_ptr_factory_.GetWeakPtr()));
     update_engine_proxy_->WaitForServiceToBeAvailable(
-        base::Bind(&UpdateEngineClientImpl::OnProxyAvailabilityChanged,
+        base::Bind(&UpdateEngineClientImpl::OnServiceInitiallyAvailable,
                    weak_ptr_factory_.GetWeakPtr()));
   }
 
  private:
-  void OnProxyAvailabilityChanged(bool service_is_available) {
+  void OnServiceInitiallyAvailable(bool service_is_available) {
     if (service_is_available) {
       // Get update engine status for the initial status. Update engine won't
       // send StatusUpdate signal unless there is a status change. If chrome
       // crashes after UPDATE_STATUS_UPDATED_NEED_REBOOT status is set,
       // restarted chrome would not get this status. See crbug.com/154104.
       GetUpdateEngineStatus();
+    } else {
+      LOG(ERROR) << "Failed to wait for D-Bus service to become available";
     }
   }
 
   void GetUpdateEngineStatus() {
     dbus::MethodCall method_call(
         update_engine::kUpdateEngineInterface,
         update_engine::kGetStatus);
     update_engine_proxy_->CallMethodWithErrorCallback(
         &method_call,
         dbus::ObjectProxy::TIMEOUT_USE_DEFAULT,
@@ skipping 357 matching lines @@
   const char** cix = std::find(
       kReleaseChannelsList,
       kReleaseChannelsList + arraysize(kReleaseChannelsList), current_channel);
   const char** tix = std::find(
       kReleaseChannelsList,
       kReleaseChannelsList + arraysize(kReleaseChannelsList), target_channel);
   return tix > cix;
 }
 
 }  // namespace chromeos