Remove codes related to scaling in GraphicsLayer tree.

Source/core/platform/graphics/GraphicsLayer.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 388 matching lines @@
     void setDebugBackgroundColor(const Color&) { }
     void setDebugBorder(const Color&, float /*borderWidth*/) { }
 
     // z-position is the z-equivalent of position(). It's only used for debugging purposes.
     float zPosition() const { return m_zPosition; }
     void setZPosition(float);
 
     void distributeOpacity(float);
     float accumulatedOpacity() const;
 
-    void setMaintainsPixelAlignment(bool maintainsAlignment) { m_maintainsPixelAlignment = maintainsAlignment; }
-    bool maintainsPixelAlignment() const { return m_maintainsPixelAlignment; }
-    
-    float pageScaleFactor() const { return m_client ? m_client->pageScaleFactor() : 1; }
-    float deviceScaleFactor() const { return m_client ? m_client->deviceScaleFactor() : 1; }
-
-    void deviceOrPageScaleFactorChanged() { }
-    void noteDeviceOrPageScaleFactorChangedIncludingDescendants();
-
     // If the exposed rect of this layer changes, returns true if this or descendant layers need a flush,
     // for example to allocate new tiles.
     bool visibleRectChangeRequiresFlush(const FloatRect& /* clipRect */) const { return false; }
 
     // Return a string with a human readable form of the layer tree, If debug is true
     // pointers for the layers and timing data will be included in the returned string.
     String layerTreeAsText(LayerTreeAsTextBehavior = LayerTreeAsTextBehaviorNormal) const;
 
     // Return an estimate of the backing store memory cost (in bytes). May be incorrect for tiled layers.
     double backingStoreMemoryEstimate() const;
@@ skipping 100 matching lines @@
     float m_zPosition;
     
     FilterOperations m_filters;
 
     bool m_contentsOpaque : 1;
     bool m_preserves3D: 1;
     bool m_backfaceVisibility : 1;
     bool m_masksToBounds : 1;
     bool m_drawsContent : 1;
     bool m_contentsVisible : 1;
-    bool m_maintainsPixelAlignment : 1;
     bool m_showDebugBorder : 1;
     bool m_showRepaintCounter : 1;
     
     GraphicsLayerPaintingPhase m_paintingPhase;
     CompositingCoordinatesOrientation m_contentsOrientation; // affects orientation of layer contents
 
     Vector<GraphicsLayer*> m_children;
     GraphicsLayer* m_parent;
 
     GraphicsLayer* m_maskLayer; // Reference to mask layer. We don't own this.
@@ skipping 37 matching lines @@
 
 
 } // namespace WebCore
 
 #ifndef NDEBUG
 // Outside the WebCore namespace for ease of invocation from gdb.
 void showGraphicsLayerTree(const WebCore::GraphicsLayer* layer);
 #endif
 
 #endif // GraphicsLayer_h