Remove most of the old compositing code.

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

Index: sky/engine/core/rendering/compositing/GraphicsLayerTreeBuilder.h
diff --git a/sky/engine/core/rendering/compositing/GraphicsLayerTreeBuilder.h b/sky/engine/core/rendering/compositing/GraphicsLayerTreeBuilder.h
deleted file mode 100644
index d2a333b3bd578d0da5cd71d2914acff182e092ef..0000000000000000000000000000000000000000
--- a/sky/engine/core/rendering/compositing/GraphicsLayerTreeBuilder.h
+++ /dev/null
@@ -1,57 +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.
- */
-
-#ifndef SKY_ENGINE_CORE_RENDERING_COMPOSITING_GRAPHICSLAYERTREEBUILDER_H_
-#define SKY_ENGINE_CORE_RENDERING_COMPOSITING_GRAPHICSLAYERTREEBUILDER_H_
-
-#include "sky/engine/platform/graphics/GraphicsLayer.h"
-
-namespace blink {
-
-class RenderLayer;
-
-class GraphicsLayerTreeBuilder {
-public:
-    GraphicsLayerTreeBuilder();
-    ~GraphicsLayerTreeBuilder();
-
-    struct AncestorInfo {
-        AncestorInfo()
-            : enclosingCompositedLayer(0)
-            , childLayersOfEnclosingCompositedLayer(0)
-        {
-        }
-
-        RenderLayer* enclosingCompositedLayer;
-        GraphicsLayerVector* childLayersOfEnclosingCompositedLayer;
-    };
-
-    void rebuild(RenderLayer&, AncestorInfo);
-};
-
-} // namespace blink
-
-#endif  // SKY_ENGINE_CORE_RENDERING_COMPOSITING_GRAPHICSLAYERTREEBUILDER_H_