Remove TiledBacking / TileCache code

Source/WebCore/rendering/RenderLayerCompositor.cpp

 /*
  * Copyright (C) 2009, 2010 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 2012 matching lines @@
 }
 
 // If an element has negative z-index children, those children render in front of the 
 // layer background, so we need an extra 'contents' layer for the foreground of the layer
 // object.
 bool RenderLayerCompositor::needsContentsCompositingLayer(const RenderLayer* layer) const
 {
     return layer->hasNegativeZOrderList();
 }
 
-bool RenderLayerCompositor::requiresScrollLayer(RootLayerAttachment attachment) const
-{
-    // This applies when the application UI handles scrolling, in which case RenderLayerCompositor doesn't need to manage it.
-    if (m_renderView->frameView()->delegatesScrolling())
-        return false;
-
-    return true;
-}
-
 static void paintScrollbar(Scrollbar* scrollbar, GraphicsContext& context, const IntRect& clip)
 {
     if (!scrollbar)
         return;
 
     context.save();
     const IntRect& scrollbarRect = scrollbar->frameRect();
     context.translate(-scrollbarRect.x(), -scrollbarRect.y());
     IntRect transformedClip = clip;
     transformedClip.moveBy(scrollbarRect.location());
@@ skipping 407 matching lines @@
         m_rootContentLayer->setName("content root");
 #endif
         IntRect overflowRect = m_renderView->pixelSnappedLayoutOverflowRect();
         m_rootContentLayer->setSize(FloatSize(overflowRect.maxX(), overflowRect.maxY()));
         m_rootContentLayer->setPosition(FloatPoint());
 
         // Need to clip to prevent transformed content showing outside this frame
         m_rootContentLayer->setMasksToBounds(true);
     }
 
-    if (requiresScrollLayer(expectedAttachment)) {
-        if (!m_overflowControlsHostLayer) {
-            ASSERT(!m_scrollLayer);
-            ASSERT(!m_clipLayer);
+    if (!m_overflowControlsHostLayer) {
+        ASSERT(!m_scrollLayer);
+        ASSERT(!m_clipLayer);
 
-            // Create a layer to host the clipping layer and the overflow controls layers.
-            m_overflowControlsHostLayer = GraphicsLayer::create(graphicsLayerFactory(), this);
+        // Create a layer to host the clipping layer and the overflow controls layers.
+        m_overflowControlsHostLayer = GraphicsLayer::create(graphicsLayerFactory(), this);
 #ifndef NDEBUG
-            m_overflowControlsHostLayer->setName("overflow controls host");
+        m_overflowControlsHostLayer->setName("overflow controls host");
 #endif
 
-            // Create a clipping layer if this is an iframe
-            m_clipLayer = GraphicsLayer::create(graphicsLayerFactory(), this);
+        // Create a clipping layer if this is an iframe
+        m_clipLayer = GraphicsLayer::create(graphicsLayerFactory(), this);
 #ifndef NDEBUG
-            m_clipLayer->setName("frame clipping");
+        m_clipLayer->setName("frame clipping");
 #endif
-            m_clipLayer->setMasksToBounds(true);
-            
-            m_scrollLayer = GraphicsLayer::create(graphicsLayerFactory(), this);
+        m_clipLayer->setMasksToBounds(true);
+
+        m_scrollLayer = GraphicsLayer::create(graphicsLayerFactory(), this);
 #ifndef NDEBUG
-            m_scrollLayer->setName("frame scrolling");
+        m_scrollLayer->setName("frame scrolling");
 #endif
-            if (ScrollingCoordinator* scrollingCoordinator = this->scrollingCoordinator())
-                scrollingCoordinator->setLayerIsContainerForFixedPositionLayers(m_scrollLayer.get(), true);
+        if (ScrollingCoordinator* scrollingCoordinator = this->scrollingCoordinator())
+            scrollingCoordinator->setLayerIsContainerForFixedPositionLayers(m_scrollLayer.get(), true);
 
-            // Hook them up
-            m_overflowControlsHostLayer->addChild(m_clipLayer.get());
-            m_clipLayer->addChild(m_scrollLayer.get());
-            m_scrollLayer->addChild(m_rootContentLayer.get());
+        // Hook them up
+        m_overflowControlsHostLayer->addChild(m_clipLayer.get());
+        m_clipLayer->addChild(m_scrollLayer.get());
+        m_scrollLayer->addChild(m_rootContentLayer.get());
 
-            frameViewDidChangeSize();
-            frameViewDidScroll();
-        }
-    } else {
-        if (m_overflowControlsHostLayer) {
-            m_overflowControlsHostLayer = nullptr;
-            m_clipLayer = nullptr;
-            m_scrollLayer = nullptr;
-        }
+        frameViewDidChangeSize();
+        frameViewDidScroll();
     }
 
     // Check to see if we have to change the attachment
     if (m_rootLayerAttachment != RootLayerUnattached)
         detachRootLayer();
 
     attachRootLayer(expectedAttachment);
 }
 
 void RenderLayerCompositor::destroyRootLayer()
@@ skipping 341 matching lines @@
     info.addMember(m_layerForOverhangAreas, "layerForOverhangAreas");
     info.addMember(m_contentShadowLayer, "contentShadowLayer");
     info.addMember(m_layerForTopOverhangArea, "layerForTopOverhangArea");
     info.addMember(m_layerForBottomOverhangArea, "layerForBottomOverhangArea");
     info.addMember(m_layerForHeader, "layerForHeader");
     info.addMember(m_layerForFooter, "layerForFooter");
 #endif
 }
 
 } // namespace WebCore