Implement requestIdleCallback API

Source/core/dom/Document.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
@@ skipping 104 matching lines @@
 class HTMLCollection;
 class HTMLDialogElement;
 class HTMLElement;
 class HTMLFrameOwnerElement;
 class HTMLHeadElement;
 class HTMLImportLoader;
 class HTMLImportsController;
 class HTMLLinkElement;
 class HTMLScriptElement;
 class HitTestRequest;
+class IdleRequestCallback;
 class InputDevice;
 class LayoutPoint;
 class LiveNodeListBase;
 class Locale;
 class LocalFrame;
 class Location;
 class MainThreadTaskRunner;
 class MediaQueryListListener;
 class MediaQueryMatcher;
 class NodeFilter;
 class NodeIterator;
 class NthIndexCache;
 class Page;
 class PlatformMouseEvent;
 class ProcessingInstruction;
 class QualifiedName;
 class Range;
 class LayoutView;
 class ResourceFetcher;
 class SVGDocumentExtensions;
 class SVGUseElement;
 class ScriptRunner;
 class ScriptableDocumentParser;
 class ScriptedAnimationController;
+class ScriptedIdleTaskController;
 class SecurityOrigin;
 class SegmentedString;
 class SelectorQueryCache;
 class SerializedScriptValue;
 class Settings;
 class StyleEngine;
 class StyleResolver;
 class StyleSheet;
 class StyleSheetList;
 class Text;
@@ skipping 757 matching lines @@
 
     PassRefPtrWillBeRawPtr<Touch> createTouch(DOMWindow*, EventTarget*, int identifier, double pageX, double pageY, double screenX, double screenY, double radiusX, double radiusY, float rotationAngle, float force) const;
     PassRefPtrWillBeRawPtr<TouchList> createTouchList(WillBeHeapVector<RefPtrWillBeMember<Touch>>&) const;
 
     const DocumentTiming& timing() const { return m_documentTiming; }
 
     int requestAnimationFrame(FrameRequestCallback*);
     void cancelAnimationFrame(int id);
     void serviceScriptedAnimations(double monotonicAnimationStartTime);
 
+    int requestIdleCallback(IdleRequestCallback*, double timeoutMillis);
+    void cancelIdleCallback(int id);
+
     EventTarget* errorEventTarget() final;
     void logExceptionToConsole(const String& errorMessage, int scriptId, const String& sourceURL, int lineNumber, int columnNumber, PassRefPtrWillBeRawPtr<ScriptCallStack>) final;
 
     void initDNSPrefetch();
 
     bool isInDocumentWrite() { return m_writeRecursionDepth > 0; }
 
     TextAutosizer* textAutosizer();
 
     PassRefPtrWillBeRawPtr<Element> createElement(const AtomicString& localName, const AtomicString& typeExtension, ExceptionState&);
@@ skipping 121 matching lines @@
 
 private:
     friend class IgnoreDestructiveWriteCountIncrementer;
     friend class NthIndexCache;
 
     bool isDocumentFragment() const = delete; // This will catch anyone doing an unnecessary check.
     bool isDocumentNode() const = delete; // This will catch anyone doing an unnecessary check.
     bool isElementNode() const = delete; // This will catch anyone doing an unnecessary check.
 
     ScriptedAnimationController& ensureScriptedAnimationController();
+    ScriptedIdleTaskController& ensureScriptedIdleTaskController();
     SecurityContext& securityContext() final { return *this; }
     EventQueue* eventQueue() const final;
 
     // FIXME: Rename the StyleRecalc state to LayoutTreeUpdate.
     bool hasPendingStyleRecalc() const { return m_lifecycle.state() == DocumentLifecycle::VisualUpdatePending; }
 
     bool shouldScheduleLayoutTreeUpdate() const;
     void scheduleLayoutTreeUpdate();
 
     bool needsFullLayoutTreeUpdate() const;
@@ skipping 254 matching lines @@
     Length m_viewportDefaultMinWidth;
 
     ReferrerPolicy m_referrerPolicy;
 
     DocumentTiming m_documentTiming;
     RefPtrWillBeMember<MediaQueryMatcher> m_mediaQueryMatcher;
     bool m_writeRecursionIsTooDeep;
     unsigned m_writeRecursionDepth;
 
     RefPtrWillBeMember<ScriptedAnimationController> m_scriptedAnimationController;
+    RefPtrWillBeMember<ScriptedIdleTaskController> m_scriptedIdleTaskController;
     OwnPtr<MainThreadTaskRunner> m_taskRunner;
     OwnPtrWillBeMember<TextAutosizer> m_textAutosizer;
 
     RefPtrWillBeMember<CustomElementRegistrationContext> m_registrationContext;
     RefPtrWillBeMember<CustomElementMicrotaskRunQueue> m_customElementMicrotaskRunQueue;
 
     void elementDataCacheClearTimerFired(Timer<Document>*);
     Timer<Document> m_elementDataCacheClearTimer;
 
     OwnPtrWillBeMember<ElementDataCache> m_elementDataCache;
@@ skipping 75 matching lines @@
 DEFINE_TYPE_CASTS(TreeScope, Document, document, true, true);
 
 } // namespace blink
 
 #ifndef NDEBUG
 // Outside the WebCore namespace for ease of invocation from gdb.
 CORE_EXPORT void showLiveDocumentInstances();
 #endif
 
 #endif // Document_h