Add support to Battery Status API in blink.

Source/modules/battery/BatteryManager.cpp

+/*
+ *  Copyright (C) 2012 Samsung Electronics
+ *  Copyright (C) 2014 Intel Corporation
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Library General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2 of the License, or (at your option) any later version.
+ *
+ *  This library is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *  Library General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Library General Public License
+ *  along with this library; see the file COPYING.LIB.  If not, write to
+ *  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ *  Boston, MA 02110-1301, USA.
+ */
+
+#include "config.h"
+#include "modules/battery/BatteryManager.h"
+
+#include "core/dom/Document.h"
+#include "core/events/Event.h"
+#include "core/frame/Frame.h"
+#include "core/frame/Navigator.h"
+#include "modules/battery/BatteryStatus.h"
+#include <limits>
+
+namespace WebCore {
+
+PassRefPtr<BatteryManager> BatteryManager::create(Navigator* navigator)
+{
+    RefPtr<BatteryManager> batteryManager(adoptRef(new BatteryManager(navigator)));
+    batteryManager->suspendIfNeeded();
+    return batteryManager.release();
+}
+
+PassRefPtr<BatteryManager> BatteryManager::create(Frame* frame)
+{
+    RefPtr<BatteryManager> batteryManager(adoptRef(new BatteryManager(frame)));
+    batteryManager->suspendIfNeeded();
+    return batteryManager.release();
+}
+
+BatteryManager::~BatteryManager()
+{
+}
+
+BatteryManager::BatteryManager(Navigator* navigator)
+    : ActiveDOMObject(navigator->frame()->document())
+    , m_batteryStatus(nullptr)
+{
+}
+
+BatteryManager::BatteryManager(Frame* frame)
+    : ActiveDOMObject(frame->document())
+    , m_batteryStatus(nullptr)
+{
+}
+
+bool BatteryManager::charging()
+{
+    return m_batteryStatus ? m_batteryStatus->charging() : true;
+}
+
+double BatteryManager::chargingTime()
+{
+    if (!m_batteryStatus || !m_batteryStatus->charging())
+        return std::numeric_limits<double>::infinity();
+
+    return m_batteryStatus->chargingTime();
+}
+
+double BatteryManager::dischargingTime()
+{
+    if (!m_batteryStatus || m_batteryStatus->charging())
+        return std::numeric_limits<double>::infinity();
+
+    return m_batteryStatus->dischargingTime();
+}
+
+double BatteryManager::level()
+{
+    return m_batteryStatus ? m_batteryStatus->level() : 1;
+}
+
+void BatteryManager::didChangeBatteryStatus(PassRefPtr<Event> event, PassRefPtr<BatteryStatus> batteryStatus)
+{
+    m_batteryStatus = batteryStatus;
+    dispatchEvent(event);
+}
+
+void BatteryManager::suspend()
+{
+}
+
+void BatteryManager::resume()
+{
+}
+
+void BatteryManager::stop()
+{
+}

[abarth-chromium, 2014/02/27 05:42:09]

Given that you don't implement these functions, there's no reason to subclass
ActiveDOMObject.

+
+} // namespace WebCore
+