Add support for accelerated fixed root background

Source/core/testing/Internals.cpp

 /*
  * 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 1455 matching lines @@
     }
 
     return document->isPageBoxVisible(pageNumber);
 }
 
 String Internals::layerTreeAsText(Document* document, ExceptionCode& ec) const
 {
     return layerTreeAsText(document, 0, ec);
 }
 
+String Internals::layerTreeAsText(Document* document, unsigned flags, ExceptionCode& ec) const
+{
+    if (!document || !document->frame()) {
+        ec = INVALID_ACCESS_ERR;
+        return String();
+    }
+
+    LayerTreeFlags layerTreeFlags = 0;
+    if (flags & LAYER_TREE_INCLUDES_VISIBLE_RECTS)
+        layerTreeFlags |= LayerTreeFlagsIncludeVisibleRects;
+    if (flags & LAYER_TREE_INCLUDES_TILE_CACHES)
+        layerTreeFlags |= LayerTreeFlagsIncludeTileCaches;
+    if (flags & LAYER_TREE_INCLUDES_REPAINT_RECTS)
+        layerTreeFlags |= LayerTreeFlagsIncludeRepaintRects;
+    if (flags & LAYER_TREE_INCLUDES_PAINTING_PHASES)
+        layerTreeFlags |= LayerTreeFlagsIncludePaintingPhases;
+    if (flags & LAYER_TREE_INCLUDES_ROOT_LAYER)
+        layerTreeFlags |= LayerTreeFlagsIncludeRootLayer;
+
+    return document->frame()->layerTreeAsText(layerTreeFlags);
+}
+
 static PassRefPtr<NodeList> paintOrderList(Element* element, ExceptionCode& ec, RenderLayer::PaintOrderListType type)
 {
     if (!element) {
         ec = INVALID_ACCESS_ERR;
         return 0;
     }
 
     element->document()->updateLayout();
 
     RenderObject* renderer = element->renderer();
@@ skipping 16 matching lines @@
 PassRefPtr<NodeList> Internals::paintOrderListBeforePromote(Element* element, ExceptionCode& ec)
 {
     return paintOrderList(element, ec, RenderLayer::BeforePromote);
 }
 
 PassRefPtr<NodeList> Internals::paintOrderListAfterPromote(Element* element, ExceptionCode& ec)
 {
     return paintOrderList(element, ec, RenderLayer::AfterPromote);
 }
 
-String Internals::layerTreeAsText(Document* document, unsigned flags, ExceptionCode& ec) const
-{
-    if (!document || !document->frame()) {
-        ec = INVALID_ACCESS_ERR;
-        return String();
-    }
-
-    LayerTreeFlags layerTreeFlags = 0;
-    if (flags & LAYER_TREE_INCLUDES_VISIBLE_RECTS)
-        layerTreeFlags |= LayerTreeFlagsIncludeVisibleRects;
-    if (flags & LAYER_TREE_INCLUDES_TILE_CACHES)
-        layerTreeFlags |= LayerTreeFlagsIncludeTileCaches;
-    if (flags & LAYER_TREE_INCLUDES_REPAINT_RECTS)
-        layerTreeFlags |= LayerTreeFlagsIncludeRepaintRects;
-    if (flags & LAYER_TREE_INCLUDES_PAINTING_PHASES)
-        layerTreeFlags |= LayerTreeFlagsIncludePaintingPhases;
-
-    return document->frame()->layerTreeAsText(layerTreeFlags);
-}
-
 void Internals::setNeedsCompositedScrolling(Element* element, unsigned needsCompositedScrolling, ExceptionCode& ec)
 {
     if (!element) {
         ec = INVALID_ACCESS_ERR;
         return;
     }
 
     element->document()->updateLayout();
 
     RenderObject* renderer = element->renderer();
@@ skipping 402 matching lines @@
 
     RenderObject* renderer = select->renderer();
     if (!renderer->isMenuList())
         return false;
 
     RenderMenuList* menuList = toRenderMenuList(renderer);
     return menuList->popupIsVisible();
 }
 
 }