Initial scroll-blocks-on compositor integration

Source/core/testing/Internals.idl

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  * Copyright (C) 2013 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 147 matching lines @@
     readonly attribute InternalSettings settings;
     readonly attribute InternalRuntimeFlags runtimeFlags;
     readonly attribute unsigned long workerThreadCount;
 
     // Flags for layerTreeAsText.
     // The values of these constants must be kept in sync with the values of LayerTreeAsTextBehaviorFlags in GraphicsLayerClient.h.
     const unsigned short LAYER_TREE_INCLUDES_REPAINT_RECTS = 2;
     const unsigned short LAYER_TREE_INCLUDES_PAINTING_PHASES = 4;
     const unsigned short LAYER_TREE_INCLUDES_ROOT_LAYER = 8;
     const unsigned short LAYER_TREE_INCLUDES_CLIP_AND_SCROLL_PARENTS = 16;
+    const unsigned short LAYER_TREE_INCLUDES_SCROLL_BLOCKS_ON = 32;
     [RaisesException, TypeChecking=Interface] DOMString layerTreeAsText(Document document, optional unsigned short flags);
     [RaisesException, TypeChecking=Interface] DOMString elementLayerTreeAsText(Element element, optional unsigned short flags);
 
     [RaisesException, TypeChecking=Interface] boolean scrollsWithRespectTo(Element element1, Element element2);
 
     [TypeChecking=Interface] DOMString scrollingStateTreeAsText(Document document);
     [RaisesException, TypeChecking=Interface] DOMString mainThreadScrollingReasons(Document document);
     [RaisesException, TypeChecking=Interface] ClientRectList nonFastScrollableRects(Document document);
 
     [TypeChecking=Interface] void garbageCollectDocumentResources(Document document);
@@ skipping 116 matching lines @@
     [RaisesException, TypeChecking=Interface] void forcePluginPlaceholder(HTMLElement plugin, DocumentFragment fragment);
     [RaisesException, TypeChecking=Interface] void forcePluginPlaceholder(HTMLElement plugin, PluginPlaceholderOptions options);
 
     DictionaryTest dictionaryTest();
     UnionTypesTest unionTypesTest();
 
     void forceBlinkGCWithoutV8GC();
 
     iterable<long>;
 };