Removing GraphicsContext from ImageBuffer

Source/core/paint/ThemePainterMac.mm

 /*
  * Copyright (C) 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Google, Inc.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 227 matching lines @@
     trackInfo.attributes = kThemeTrackHorizontal;
     trackInfo.enableState = LayoutTheme::isActive(layoutObject) ? kThemeTrackActive : kThemeTrackInactive;
     trackInfo.reserved = 0;
     trackInfo.filler1 = 0;
 
     OwnPtr<ImageBuffer> imageBuffer = ImageBuffer::create(inflatedRect.size());
     if (!imageBuffer)
         return true;
 
     IntRect clipRect = IntRect(IntPoint(), inflatedRect.size());
-    LocalCurrentGraphicsContext localContext(imageBuffer->context(), &clipRect, clipRect);
+    LocalCurrentGraphicsContext localContext(imageBuffer->canvas(), 1, &clipRect, clipRect);
     CGContextRef cgContext = localContext.cgContext();
     HIThemeDrawTrack(&trackInfo, 0, cgContext, kHIThemeOrientationNormal);
 
     GraphicsContextStateSaver stateSaver(*paintInfo.context);
 
     if (!layoutProgress->style()->isLeftToRightDirection()) {
         paintInfo.context->translate(2 * inflatedRect.x() + inflatedRect.width(), 0);
         paintInfo.context->scale(-1, 1);
     }
 
@@ skipping 333 matching lines @@
         [search setSearchMenuTemplate:nil];
 
     m_layoutTheme.updateActiveState([search searchButtonCell], o);
 
     [[search searchButtonCell] drawWithFrame:unzoomedRect inView:m_layoutTheme.documentViewFor(o)];
     [[search searchButtonCell] setControlView:nil];
     return false;
 }
 
 } // namespace blink