Initial implementation of API WakeLock.

Source/modules/wake_lock/NavigatorWakeLock.cpp

+// Copyright 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 "config.h"
+#include "modules/wake_lock/NavigatorWakeLock.h"
+
+#include "core/frame/Navigator.h"
+#include "modules/wake_lock/WakeLock.h"
+
+namespace blink {
+
+NavigatorWakeLock::NavigatorWakeLock()
+{
+}
+
+NavigatorWakeLock::~NavigatorWakeLock()
+{
+}
+
+const char* NavigatorWakeLock::supplementName()
+{
+    return "NavigatorWakeLock";
+}
+
+NavigatorWakeLock& NavigatorWakeLock::from(Navigator& navigator)
+{
+    NavigatorWakeLock* supplement = static_cast<NavigatorWakeLock*>(WillBeHeapSupplement<Navigator>::from(navigator, supplementName()));
+    if (!supplement) {
+        supplement = new NavigatorWakeLock();
+        provideTo(navigator, supplementName(), adoptPtrWillBeNoop(supplement));
+    }
+    return *supplement;
+}
+
+WakeLock* NavigatorWakeLock::wakeLock(ScriptState* state, Navigator& navigator)
+{
+    return NavigatorWakeLock::from(navigator).wakeLock(state);
+}
+
+WakeLock* NavigatorWakeLock::wakeLock(ScriptState* state)
+{
+    if (!m_wakeLock && state)
+        m_wakeLock = WakeLock::create(state->executionContext());
+    return m_wakeLock.get();
+}
+
+void NavigatorWakeLock::trace(Visitor* visitor)
+{
+    visitor->trace(m_wakeLock);
+    WillBeHeapSupplement<Navigator>::trace(visitor);
+}
+
+} // namespace blink