Implement requestIdleCallback API

Source/core/dom/IdleCallbackDeadline.h

+// Copyright 2015 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.
+
+#ifndef IdleCallbackDeadline_h
+#define IdleCallbackDeadline_h
+
+#include "bindings/core/v8/ScriptWrappable.h"
+#include "core/dom/ScriptedIdleTaskController.h"
+#include "platform/heap/Handle.h"
+
+namespace blink {
+
+class DocumentLoadTiming;
+
+class IdleCallbackDeadline : public GarbageCollected<IdleCallbackDeadline>, public ScriptWrappable {
+    DEFINE_WRAPPERTYPEINFO();
+public:
+    DEFINE_INLINE_TRACE() { }
+    static IdleCallbackDeadline* create(double deadline, bool didTimeout, const DocumentLoadTiming& timing)

[jochen (gone - plz use gerrit), 2015/07/31 09:19:19]

please use an enum instead of a bool

[rmcilroy, 2015/08/11 16:30:51]

Done.

+    {
+        return new IdleCallbackDeadline(deadline, didTimeout, timing);
+    }
+
+    double deadline()

[Sami, 2015/08/10 09:47:47]

nit: const

[rmcilroy, 2015/08/11 16:30:51]

Done.

+    {
+        return m_deadline;
+    }
+
+    bool didTimeout()

[Sami, 2015/08/10 09:47:46]

nit const

[rmcilroy, 2015/08/11 16:30:51]

Done.

+    {
+        return m_didTimeout;
+    }
+
+    bool isExceeded();

[Sami, 2015/08/10 09:47:46]

nit const

[rmcilroy, 2015/08/11 16:30:51]

Done.

+
+private:
+    IdleCallbackDeadline(double deadline, bool didTimeout, const DocumentLoadTiming&);
+
+    double m_deadline;
+    bool m_didTimeout;
+    const DocumentLoadTiming& m_timing;
+};
+}
+
+#endif // IdleCallbackDeadline_h