C++11: Replace 0 with nullptr where applicable in layout code.

Source/core/layout/compositing/CompositedDeprecatedPaintLayerMapping.cpp

 /*
  * Copyright (C) 2009, 2010, 2011 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.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 120 matching lines @@
     if (!layoutObject->style()->hasBackground())
         return true;
 
     // Simple background that is contained within the contents rect.
     return contentsRect(layoutObject).contains(backgroundRect(layoutObject));
 }
 
 static WebLayer* platformLayerForPlugin(LayoutObject* layoutObject)
 {
     if (!layoutObject->isEmbeddedObject())
-        return 0;
+        return nullptr;
     Widget* widget = toLayoutEmbeddedObject(layoutObject)->widget();
     if (!widget || !widget->isPluginView())
-        return 0;
+        return nullptr;
     return toPluginView(widget)->platformLayer();
 
 }
 
 static inline bool isAcceleratedContents(LayoutObject* layoutObject)
 {
     return isAcceleratedCanvas(layoutObject)
         || (layoutObject->isEmbeddedObject() && toLayoutEmbeddedObject(layoutObject)->requiresAcceleratedCompositing())
         || layoutObject->isVideo();
 }
 
 // Get the scrolling coordinator in a way that works inside CompositedDeprecatedPaintLayerMapping's destructor.
 static ScrollingCoordinator* scrollingCoordinatorFromLayer(DeprecatedPaintLayer& layer)
 {
     Page* page = layer.layoutObject()->frame()->page();
-    if (!page)
-        return 0;
-
-    return page->scrollingCoordinator();
+    return (!page) ? nullptr : page->scrollingCoordinator();
 }
 
 CompositedDeprecatedPaintLayerMapping::CompositedDeprecatedPaintLayerMapping(DeprecatedPaintLayer& layer)
     : m_owningLayer(layer)
     , m_contentOffsetInCompositingLayerDirty(false)
     , m_pendingUpdateScope(GraphicsLayerUpdateNone)
     , m_isMainFrameLayoutViewLayer(false)
     , m_backgroundLayerPaintsFixedRootBackground(false)
     , m_scrollingContentsAreEmpty(false)
 {
@@ skipping 24 matching lines @@
     updateBackgroundLayer(false);
     updateMaskLayer(false);
     updateClippingMaskLayers(false);
     updateScrollingLayers(false);
     updateSquashingLayers(false);
     destroyGraphicsLayers();
 }
 
 PassOwnPtr<GraphicsLayer> CompositedDeprecatedPaintLayerMapping::createGraphicsLayer(CompositingReasons reasons)
 {
-    GraphicsLayerFactory* graphicsLayerFactory = 0;
+    GraphicsLayerFactory* graphicsLayerFactory = nullptr;
     if (Page* page = layoutObject()->frame()->page())
         graphicsLayerFactory = page->chromeClient().graphicsLayerFactory();
 
     OwnPtr<GraphicsLayer> graphicsLayer = GraphicsLayer::create(graphicsLayerFactory, this);
 
     graphicsLayer->setCompositingReasons(reasons);
     if (Node* owningNode = m_owningLayer.layoutObject()->generatingNode())
         graphicsLayer->setOwnerNodeId(DOMNodeIds::idForNode(owningNode));
 
     return graphicsLayer.release();
@@ skipping 280 matching lines @@
         else if (isAcceleratedContents(layoutObject))
             m_graphicsLayer->setContentsClippingMaskLayer(m_childClippingMaskLayer.get());
     }
 
     if (m_owningLayer.reflectionInfo()) {
         if (m_owningLayer.reflectionInfo()->reflectionLayer()->hasCompositedDeprecatedPaintLayerMapping()) {
             GraphicsLayer* reflectionLayer = m_owningLayer.reflectionInfo()->reflectionLayer()->compositedDeprecatedPaintLayerMapping()->mainGraphicsLayer();
             m_graphicsLayer->setReplicatedByLayer(reflectionLayer);
         }
     } else {
-        m_graphicsLayer->setReplicatedByLayer(0);
+        m_graphicsLayer->setReplicatedByLayer(nullptr);
     }
 
     updateBackgroundColor();
 
     if (layoutObject->isImage()) {
         if (isDirectlyCompositedImage()) {
             updateImageContents();
         } else if (m_graphicsLayer->hasContentsLayer()) {
-            m_graphicsLayer->setContentsToImage(0);
+            m_graphicsLayer->setContentsToImage(nullptr);
         }
     }
 
     if (WebLayer* layer = platformLayerForPlugin(layoutObject)) {
         m_graphicsLayer->setContentsToPlatformLayer(layer);
     } else if (layoutObject->node() && layoutObject->node()->isFrameOwnerElement() && toHTMLFrameOwnerElement(layoutObject->node())->contentFrame()) {
         Frame* frame = toHTMLFrameOwnerElement(layoutObject->node())->contentFrame();
         if (frame->isRemoteFrame()) {
             WebLayer* layer = toRemoteFrame(frame)->remotePlatformLayer();
             m_graphicsLayer->setContentsToPlatformLayer(layer);
@@ skipping 1518 matching lines @@
             layer->invalidateDisplayItemClient(displayItemClient);
     }, ApplyToContentLayers);
 }
 
 const GraphicsLayerPaintInfo* CompositedDeprecatedPaintLayerMapping::containingSquashedLayer(const LayoutObject* layoutObject, const Vector<GraphicsLayerPaintInfo>& layers, unsigned maxSquashedLayerIndex)
 {
     for (size_t i = 0; i < layers.size() && i < maxSquashedLayerIndex; ++i) {
         if (layoutObject->isDescendantOf(layers[i].paintLayer->layoutObject()))
             return &layers[i];
     }
-    return 0;
+    return nullptr;
 }
 
 const GraphicsLayerPaintInfo* CompositedDeprecatedPaintLayerMapping::containingSquashedLayer(const LayoutObject* layoutObject, unsigned maxSquashedLayerIndex)
 {
     return CompositedDeprecatedPaintLayerMapping::containingSquashedLayer(layoutObject, m_squashedLayers, maxSquashedLayerIndex);
 }
 
 IntRect CompositedDeprecatedPaintLayerMapping::localClipRectForSquashedLayer(const DeprecatedPaintLayer& referenceLayer, const GraphicsLayerPaintInfo& paintInfo, const Vector<GraphicsLayerPaintInfo>& layers)
 {
     const LayoutObject* clippingContainer = paintInfo.paintLayer->clippingContainer();
@@ skipping 277 matching lines @@
     } else if (graphicsLayer == m_scrollingBlockSelectionLayer.get()) {
         name = "Scrolling Block Selection Layer";
     } else {
         ASSERT_NOT_REACHED();
     }
 
     return name;
 }
 
 } // namespace blink