Remove codes related to scaling in GraphicsLayer tree.

Source/core/platform/graphics/GraphicsLayer.cpp

 /*
  * 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 96 matching lines @@
     : m_client(client)
     , m_anchorPoint(0.5f, 0.5f, 0)
     , m_opacity(1)
     , m_zPosition(0)
     , m_contentsOpaque(false)
     , m_preserves3D(false)
     , m_backfaceVisibility(true)
     , m_masksToBounds(false)
     , m_drawsContent(false)
     , m_contentsVisible(true)
-    , m_maintainsPixelAlignment(false)
     , m_showDebugBorder(false)
     , m_showRepaintCounter(false)
     , m_paintingPhase(GraphicsLayerPaintAllWithOverflowClip)
     , m_contentsOrientation(CompositingCoordinatesTopDown)
     , m_parent(0)
     , m_maskLayer(0)
     , m_replicaLayer(0)
     , m_replicatedLayer(0)
     , m_repaintCount(0)
     , m_contentsLayer(0)
@@ skipping 192 matching lines @@
                 break;
             }
         }
 
         setParent(0);
     }
 
     platformLayer()->removeFromParent();
 }
 
-void GraphicsLayer::noteDeviceOrPageScaleFactorChangedIncludingDescendants()
-{
-    deviceOrPageScaleFactorChanged();
-
-    if (m_maskLayer)
-        m_maskLayer->deviceOrPageScaleFactorChanged();
-
-    if (m_replicaLayer)
-        m_replicaLayer->noteDeviceOrPageScaleFactorChangedIncludingDescendants();
-
-    const Vector<GraphicsLayer*>& childLayers = children();
-    size_t numChildren = childLayers.size();
-    for (size_t i = 0; i < numChildren; ++i)
-        childLayers[i]->noteDeviceOrPageScaleFactorChangedIncludingDescendants();
-}
-
 void GraphicsLayer::setReplicatedByLayer(GraphicsLayer* layer)
 {
     // FIXME: this could probably be a full early exit.
     if (m_replicaLayer != layer) {
         if (m_replicaLayer)
             m_replicaLayer->setReplicatedLayer(0);
 
         if (layer)
             layer->setReplicatedLayer(this);
 
@@ skipping 1103 matching lines @@
 #ifndef NDEBUG
 void showGraphicsLayerTree(const WebCore::GraphicsLayer* layer)
 {
     if (!layer)
         return;
 
     String output = layer->layerTreeAsText(LayerTreeAsTextDebug | LayerTreeAsTextIncludeVisibleRects);
     fprintf(stderr, "%s\n", output.utf8().data());
 }
 #endif