Implement requestIdleCallback API

Source/core/dom/Document.h

Index: Source/core/dom/Document.h
diff --git a/Source/core/dom/Document.h b/Source/core/dom/Document.h
index b52c7762a02bb2ae37948adb77c0d4c29be055d7..ca1c0f398ef9ff60caeef11024b3869294eca4af 100644
--- a/Source/core/dom/Document.h
+++ b/Source/core/dom/Document.h
@@ -122,6 +122,7 @@ class HTMLImportsController;
 class HTMLLinkElement;
 class HTMLScriptElement;
 class HitTestRequest;
+class IdleRequestCallback;
 class LayoutPoint;
 class LiveNodeListBase;
 class Locale;
@@ -145,6 +146,7 @@ class SVGUseElement;
 class ScriptRunner;
 class ScriptableDocumentParser;
 class ScriptedAnimationController;
+class ScriptedIdleTaskController;
 class SecurityOrigin;
 class SegmentedString;
 class SelectorQueryCache;
@@ -926,9 +928,13 @@ public:
     void cancelAnimationFrame(int id);
     void serviceScriptedAnimations(double monotonicAnimationStartTime);
 
+    int requestIdleCallback(IdleRequestCallback*, double timeout);

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

nit: timeoutMs/Millis/Milliseconds? (here and elsewhere)

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

Done.

+    void cancelIdleCallback(int id);
+
     EventTarget* errorEventTarget() final;
     void logExceptionToConsole(const String& errorMessage, int scriptId, const String& sourceURL, int lineNumber, int columnNumber, PassRefPtrWillBeRawPtr<ScriptCallStack>) final;
 
+

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

nit. remove

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

Done.

     void initDNSPrefetch();
 
     bool isInDocumentWrite() { return m_writeRecursionDepth > 0; }
@@ -1067,6 +1073,7 @@ private:
     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;
 
@@ -1341,6 +1348,7 @@ private:
     unsigned m_writeRecursionDepth;
 
     RefPtrWillBeMember<ScriptedAnimationController> m_scriptedAnimationController;
+    RefPtrWillBeMember<ScriptedIdleTaskController> m_scriptedIdleTaskController;
     OwnPtr<MainThreadTaskRunner> m_taskRunner;
     OwnPtrWillBeMember<TextAutosizer> m_textAutosizer;