Shrink RenderLayerCompositor by 5% by removing unused code

Source/core/rendering/compositing/RenderLayerCompositor.h

 /*
  * Copyright (C) 2009 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 148 matching lines @@
         RootLayerAttachedViaChromeClient,
         RootLayerAttachedViaEnclosingFrame
     };
 
     RootLayerAttachment rootLayerAttachment() const { return m_rootLayerAttachment; }
     void updateRootLayerAttachment();
     void updateRootLayerPosition();
 
     void setIsInWindow(bool);
 
-    void clearMappingForAllRenderLayers();
-
-    // Walk the tree looking for layers with 3d transforms. Useful in case you need
-    // to know if there is non-affine content, e.g. for drawing into an image.
-    bool has3DContent() const;
-
     static RenderLayerCompositor* frameContentsCompositor(RenderPart*);
     // Return true if the layers changed.
     static bool parentFrameContentLayers(RenderPart*);
 
     // Update the geometry of the layers used for clipping and scrolling in frames.
     void frameViewDidChangeLocation(const IntPoint& contentsOffset);
     void frameViewDidChangeSize();
     void frameViewDidScroll();
     void frameViewScrollbarsExistenceDidChange();
     void rootFixedBackgroundsChanged();
@@ skipping 81 matching lines @@
 
     void updateCompositingLayersInternal();
 
     // Returns indirect reasons that a layer should be composited because of something in its subtree.
     CompositingReasons subtreeReasonsForCompositing(RenderObject*, bool hasCompositedDescendants, bool has3DTransformedDescendants) const;
 
     // Make or destroy the CompositedLayerMapping for this layer; returns true if the compositedLayerMapping changed.
     bool allocateOrClearCompositedLayerMapping(RenderLayer*, CompositingStateTransitionType compositedLayerUpdate);
     bool updateSquashingAssignment(RenderLayer*, SquashingState&, CompositingStateTransitionType compositedLayerUpdate);
 
-    void clearMappingForRenderLayerIncludingDescendants(RenderLayer*);
-
     void recursiveRepaintLayer(RenderLayer*);
 
     void addToOverlapMap(OverlapMap&, RenderLayer*, const IntRect& layerBounds);
 
     // Forces an update for all frames of frame tree recursively. Used only when the mainFrame compositor is ready to
     // finish all deferred work.
     static void finishCompositingUpdateForFrameTree(LocalFrame*);
 
     void computeCompositingRequirements(RenderLayer* ancestorLayer, RenderLayer*, OverlapMap*, struct CompositingRecursionData&, bool& descendantHas3DTransform, Vector<RenderLayer*>& unclippedDescendants, IntRect& absoluteDecendantBoundingBox);
 
     // Defines which RenderLayers will paint into which composited backings, by allocating and destroying CompositedLayerMappings as needed.
     void assignLayersToBackings(RenderLayer*, bool& layersChanged);
     void assignLayersToBackingsInternal(RenderLayer*, SquashingState&, bool& layersChanged, RenderLayer* clippingAncestor);
 
-    // Allocates, sets up hierarchy, and sets appropriate properties for the GraphicsLayers that correspond to a given
-    // composited RenderLayer. Does nothing if the given RenderLayer does not have a CompositedLayerMapping.
-    void updateGraphicsLayersMappedToRenderLayer(RenderLayer*);
-
-    // Recurses down the tree, updating layer geometry only.
-    void updateLayerTreeGeometry(RenderLayer*);
-
     // Hook compositing layers together
     void setCompositingParent(RenderLayer* childLayer, RenderLayer* parentLayer);
     void removeCompositedChildren(RenderLayer*);
 
-    bool layerHas3DContent(const RenderLayer*) const;
     bool isRunningAcceleratedTransformAnimation(RenderObject*) const;
 
     bool hasAnyAdditionalCompositedLayers(const RenderLayer* rootLayer) const;
 
     void ensureRootLayer();
     void destroyRootLayer();
 
     void attachRootLayer(RootLayerAttachment);
     void detachRootLayer();
 
     bool isMainFrame() const;
 
     void updateOverflowControlsLayers();
 
     void notifyIFramesOfCompositingChange();
 
     Page* page() const;
 
     GraphicsLayerFactory* graphicsLayerFactory() const;
     ScrollingCoordinator* scrollingCoordinator() const;
 
     void addViewportConstrainedLayer(RenderLayer*);
 
-    FixedPositionViewportConstraints computeFixedViewportConstraints(RenderLayer*) const;
-    StickyPositionViewportConstraints computeStickyViewportConstraints(RenderLayer*) const;
-
     bool requiresHorizontalScrollbarLayer() const;
     bool requiresVerticalScrollbarLayer() const;
     bool requiresScrollCornerLayer() const;
 #if USE(RUBBER_BANDING)
     bool requiresOverhangLayers() const;
 #endif
 
     void applyUpdateLayerCompositingStateChickenEggHacks(RenderLayer*, CompositingStateTransitionType compositedLayerUpdate);
     void assignLayersToBackingsForReflectionLayer(RenderLayer* reflectionLayer, bool& layersChanged);
 
@@ skipping 45 matching lines @@
     OwnPtr<GraphicsLayer> m_layerForScrollCorner;
 #if USE(RUBBER_BANDING)
     OwnPtr<GraphicsLayer> m_layerForOverhangShadow;
 #endif
 };
 
 
 } // namespace WebCore
 
 #endif // RenderLayerCompositor_h