Remove codes related to scaling in GraphicsLayer tree.

Source/core/rendering/RenderLayerCompositor.cpp

 /*
  * Copyright (C) 2009, 2010 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 2117 matching lines @@
 void RenderLayerCompositor::setTracksRepaints(bool tracksRepaints)
 {
     m_isTrackingRepaints = tracksRepaints;
 }
 
 bool RenderLayerCompositor::isTrackingRepaints() const
 {
     return m_isTrackingRepaints;
 }
 
-float RenderLayerCompositor::deviceScaleFactor() const
-{
-    Page* page = this->page();
-    return page ? page->deviceScaleFactor() : 1;
-}
-
-float RenderLayerCompositor::pageScaleFactor() const
-{
-    Page* page = this->page();
-    return page ? page->pageScaleFactor() : 1;
-}
-
 void RenderLayerCompositor::didCommitChangesForLayer(const GraphicsLayer*) const
 {
     // Nothing to do here yet.
 }
 
-bool RenderLayerCompositor::keepLayersPixelAligned() const
-{
-    // When scaling, attempt to align compositing layers to pixel boundaries.
-    return true;
-}
-
 static bool shouldCompositeOverflowControls(FrameView* view)
 {
     if (Page* page = view->frame()->page()) {
         if (ScrollingCoordinator* scrollingCoordinator = page->scrollingCoordinator())
             if (scrollingCoordinator->coordinatesScrollingForFrameView(view))
                 return true;
     }
 
     return true;
 }
@@ skipping 455 matching lines @@
         size_t listSize = normalFlowList->size();
         for (size_t i = 0; i < listSize; ++i) {
             RenderLayer* curLayer = normalFlowList->at(i);
             if (layerHas3DContent(curLayer))
                 return true;
         }
     }
     return false;
 }
 
-void RenderLayerCompositor::deviceOrPageScaleFactorChanged()
-{
-    // Start at the RenderView's layer, since that's where the scale is applied.
-    RenderLayer* viewLayer = m_renderView->layer();
-    if (!viewLayer->isComposited())
-        return;
-
-    if (GraphicsLayer* rootLayer = viewLayer->backing()->childForSuperlayers())
-        rootLayer->noteDeviceOrPageScaleFactorChangedIncludingDescendants();
-}
-
 static bool isRootmostFixedOrStickyLayer(RenderLayer* layer)
 {
     if (layer->renderer()->isStickyPositioned())
         return true;
 
     if (layer->renderer()->style()->position() != FixedPosition)
         return false;
 
     for (RenderLayer* stackingContainer = layer->ancestorStackingContainer(); stackingContainer; stackingContainer = stackingContainer->ancestorStackingContainer()) {
         if (stackingContainer->isComposited() && stackingContainer->renderer()->style()->position() == FixedPosition)
@@ skipping 121 matching lines @@
     info.addMember(m_layerForScrollCorner, "layerForScrollCorner");
 #if ENABLE(RUBBER_BANDING)
     info.addMember(m_layerForOverhangAreas, "layerForOverhangAreas");
     info.addMember(m_contentShadowLayer, "contentShadowLayer");
     info.addMember(m_layerForTopOverhangArea, "layerForTopOverhangArea");
     info.addMember(m_layerForBottomOverhangArea, "layerForBottomOverhangArea");
 #endif
 }
 
 } // namespace WebCore