Clean up transform methods in GraphicsContext.

Source/core/rendering/compositing/CompositedLayerMapping.cpp

 /*
  * Copyright (C) 2009, 2010, 2011 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 1978 matching lines @@
     else if (compositor()->fixedRootBackgroundLayer())
         paintFlags |= PaintLayerPaintingSkipRootBackground;
 
     // Note carefully: in theory it is appropriate to invoke context->save() here
     // and restore the context after painting. For efficiency, we are assuming that
     // it is equivalent to manually undo this offset translation, which means we are
     // assuming that the context's space was not affected by the RenderLayer
     // painting code.
 
     IntSize offset = paintInfo.offsetFromRenderer;
-    context->translate(-offset);
+    context->translate(-offset.width(), -offset.height());
 
     // The dirtyRect is in the coords of the painting root.
     IntRect dirtyRect(clip);
     dirtyRect.move(offset);
 
     if (!(paintInfo.paintingPhase & GraphicsLayerPaintOverflowContents)) {
         LayoutRect bounds = paintInfo.compositedBounds;
         bounds.move(paintInfo.renderLayer->subpixelAccumulation());
         dirtyRect.intersect(pixelSnappedIntRect(bounds));
     } else {
@@ skipping 23 matching lines @@
         context->save();
         dirtyRect.intersect(paintInfo.localClipRectForSquashedLayer);
         context->clip(dirtyRect);
         paintInfo.renderLayer->paintLayer(context, paintingInfo, paintFlags);
         context->restore();
     }
 
     ASSERT(!paintInfo.renderLayer->usedTransparency());
 
     // Manually restore the context to its original state by applying the opposite translation.
-    context->translate(offset);
+    context->translate(offset.width(), offset.height());
 }
 
 static void paintScrollbar(Scrollbar* scrollbar, GraphicsContext& context, const IntRect& clip)
 {
     if (!scrollbar)
         return;
 
     context.save();
     const IntRect& scrollbarRect = scrollbar->frameRect();
     context.translate(-scrollbarRect.x(), -scrollbarRect.y());
@@ skipping 186 matching lines @@
     } else if (graphicsLayer == m_scrollingContentsLayer.get()) {
         name = "Scrolling Contents Layer";
     } else {
         ASSERT_NOT_REACHED();
     }
 
     return name;
 }
 
 } // namespace WebCore