Request power status update from power manager when power button view gets created.

chrome/browser/chromeos/status/power_menu_button.cc

 // Copyright (c) 2011 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 "chrome/browser/chromeos/status/power_menu_button.h"
 
 #include <algorithm>
 
 #include "base/auto_reset.h"
 #include "base/string_number_conversions.h"
@@ skipping 199 matching lines @@
     : StatusAreaButton(delegate, this),
       battery_is_present_(false),
       line_power_on_(false),
       battery_percentage_(0.0),
       battery_time_to_full_(TimeDelta::FromMicroseconds(kInitialMS)),
       battery_time_to_empty_(TimeDelta::FromMicroseconds(kInitialMS)),
       status_(NULL) {
   set_id(VIEW_ID_STATUS_BUTTON_POWER);
   UpdateIconAndLabelInfo();
   DBusThreadManager::Get()->GetPowerManagerClient()->AddObserver(this);
+  DBusThreadManager::Get()->GetPowerManagerClient()->RequestStatusUpdate();
 }
 
 PowerMenuButton::~PowerMenuButton() {
   DBusThreadManager::Get()->GetPowerManagerClient()->RemoveObserver(this);
 }
 
 // PowerMenuButton, views::MenuDelegate implementation:
 
 string16 PowerMenuButton::GetLabel(int id) const {
   return string16();
@@ skipping 150 matching lines @@
   // If previous is 0, then it either was never set (initial condition)
   // or got down to 0.
   if (*previous == TimeDelta::FromMicroseconds(kInitialMS) ||
       diff < kMinDiff ||
       diff > kMaxDiff) {
     *previous = current;
   }
 }
 
 }  // namespace chromeos