Remove most of the old compositing code.

sky/engine/core/rendering/compositing/GraphicsLayerTreeBuilder.cpp

Index: sky/engine/core/rendering/compositing/GraphicsLayerTreeBuilder.cpp
diff --git a/sky/engine/core/rendering/compositing/GraphicsLayerTreeBuilder.cpp b/sky/engine/core/rendering/compositing/GraphicsLayerTreeBuilder.cpp
deleted file mode 100644
index 5ffdaea11f98eb5ddb5f9dad33a33f2eee23735a..0000000000000000000000000000000000000000
--- a/sky/engine/core/rendering/compositing/GraphicsLayerTreeBuilder.cpp
+++ /dev/null
@@ -1,96 +0,0 @@
-/*
- * Copyright (C) 2009, 2010 Apple Inc. All rights reserved.
- * Copyright (C) 2014 Google 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
- *    documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
- * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include "sky/engine/config.h"
-#include "sky/engine/core/rendering/compositing/GraphicsLayerTreeBuilder.h"
-
-#include "sky/engine/core/rendering/RenderLayer.h"
-#include "sky/engine/core/rendering/RenderView.h"
-#include "sky/engine/core/rendering/compositing/CompositedLayerMapping.h"
-#include "sky/engine/core/rendering/compositing/RenderLayerCompositor.h"
-
-namespace blink {
-
-GraphicsLayerTreeBuilder::GraphicsLayerTreeBuilder()
-{
-}
-
-GraphicsLayerTreeBuilder::~GraphicsLayerTreeBuilder()
-{
-}
-
-void GraphicsLayerTreeBuilder::rebuild(RenderLayer& layer, AncestorInfo info)
-{
-    // Make the layer compositing if necessary, and set up clipping and content layers.
-    // Note that we can only do work here that is independent of whether the descendant layers
-    // have been processed. computeCompositingRequirements() will already have done the paint invalidation if necessary.
-
-    layer.stackingNode()->updateLayerListsIfNeeded();
-
-    const bool hasCompositedLayerMapping = layer.hasCompositedLayerMapping();
-    CompositedLayerMapping* currentCompositedLayerMapping = layer.compositedLayerMapping();
-
-    // If this layer has a compositedLayerMapping, then that is where we place subsequent children GraphicsLayers.
-    // Otherwise children continue to append to the child list of the enclosing layer.
-    GraphicsLayerVector layerChildren;
-    AncestorInfo infoForChildren(info);
-    if (hasCompositedLayerMapping) {
-        infoForChildren.childLayersOfEnclosingCompositedLayer = &layerChildren;
-        infoForChildren.enclosingCompositedLayer = &layer;
-    }
-
-#if ENABLE(ASSERT)
-    LayerListMutationDetector mutationChecker(layer.stackingNode());
-#endif
-
-    if (layer.stackingNode()->isStackingContext()) {
-        RenderLayerStackingNodeIterator iterator(*layer.stackingNode(), NegativeZOrderChildren);
-        while (RenderLayerStackingNode* curNode = iterator.next())
-            rebuild(*curNode->layer(), infoForChildren);
-
-        // If a negative z-order child is compositing, we get a foreground layer which needs to get parented.
-        if (hasCompositedLayerMapping && currentCompositedLayerMapping->foregroundLayer())
-            infoForChildren.childLayersOfEnclosingCompositedLayer->append(currentCompositedLayerMapping->foregroundLayer());
-    }
-
-    RenderLayerStackingNodeIterator iterator(*layer.stackingNode(), NormalFlowChildren | PositiveZOrderChildren);
-    while (RenderLayerStackingNode* curNode = iterator.next())
-        rebuild(*curNode->layer(), infoForChildren);
-
-    if (hasCompositedLayerMapping) {
-        currentCompositedLayerMapping->parentForSublayers()->setChildren(layerChildren);
-
-        info.childLayersOfEnclosingCompositedLayer->append(currentCompositedLayerMapping->childForSuperlayers());
-    }
-
-    if (layer.scrollParent()
-        && layer.scrollParent()->hasCompositedLayerMapping()
-        && layer.scrollParent()->compositedLayerMapping()->needsToReparentOverflowControls()
-        && layer.scrollParent()->scrollableArea()->topmostScrollChild() == &layer)
-        info.childLayersOfEnclosingCompositedLayer->append(layer.scrollParent()->compositedLayerMapping()->detachLayerForOverflowControls(*info.enclosingCompositedLayer));
-}
-
-}