Initial implementation of API WakeLock.

Source/modules/wake_lock/WakeLock.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/WakeLock.h"
+
+#include "core/dom/Document.h"
+#include "modules/wake_lock/WakeLockController.h"
+#include "modules/wake_lock/WakeLockPromiseResolver.h"
+#include "public/platform/WebWakeLockType.h"
+
+namespace blink {
+
+static WebWakeLockType stringToWakeLockType(const AtomicString& wakeLockString)
+{
+    WebWakeLockType type = WebWakeLockGuard;
+    if (wakeLockString == "screen")
+        type = WebWakeLockScreen;
+    else if (wakeLockString == "system")
+        type = WebWakeLockSystem;
+    else
+        ASSERT_NOT_REACHED();
+    return type;
+}
+
+PassRefPtrWillBeRawPtr<WakeLock> WakeLock::create(ExecutionContext* context)
+{
+    RefPtrWillBeRawPtr<WakeLock> wakeLock = adoptRefWillBeNoop(new WakeLock(context));
+    wakeLock->suspendIfNeeded();
+    return wakeLock.release();
+}
+
+WakeLock::WakeLock(ExecutionContext* context)
+    : ActiveDOMObject(context)
+{
+    ScriptWrappable::init(this);
+}
+
+WakeLock::~WakeLock()
+{
+}
+
+Document* WakeLock::document() const
+{
+    return toDocument(executionContext());
+}
+
+Page* WakeLock::page() const
+{
+    return document() ? document()->page() : 0;
+}
+
+ScriptPromise WakeLock::request(ScriptState* scriptState, const AtomicString& stringType)
+{
+    WebWakeLockType type = stringToWakeLockType(stringType);
+    if (WakeLockController* controller = WakeLockController::from(page()))
+        return controller->requestWakeLock(scriptState, type);
+
+    WakeLockPromiseResolverOwnPtr resolver = WakeLockPromiseResolver::create(scriptState, type);
+    resolver->reject();
+    return resolver->promise();
+}
+
+ScriptPromise WakeLock::release(ScriptState* scriptState, const AtomicString& stringType)
+{
+    WebWakeLockType type = stringToWakeLockType(stringType);
+    if (WakeLockController* controller = WakeLockController::from(page()))
+        return controller->requestWakeUnlock(scriptState, type);
+
+    WakeLockPromiseResolverOwnPtr resolver = WakeLockPromiseResolver::create(scriptState, type);
+    resolver->reject();
+    return resolver->promise();
+}
+
+bool WakeLock::isHeld(const AtomicString& type)
+{
+    if (WakeLockController* controller = WakeLockController::from(page()))
+        return controller->isHeld(stringToWakeLockType(type));
+
+    return false;
+}
+
+} // namespace blink