Fix progress bar regression on Mac

Source/platform/mac/LocalCurrentGraphicsContext.mm

 /*
  * Copyright (C) 2006 Apple Computer, 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,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 49 matching lines @@
 
 CGContextRef LocalCurrentGraphicsContext::cgContext()
 {
     // This synchronizes the CGContext to reflect the current SkCanvas state.
     // The implementation may not return the same CGContext each time.
     CGContextRef cgContext = m_skiaBitLocker.cgContext();
 
     return cgContext;
 }
 
-ContextContainer::ContextContainer(GraphicsContext* graphicsContext,
-                                   IntRect clipRect)
-    : m_skiaBitLocker(graphicsContext->canvas(),
-                      ThemeMac::inflateRectForAA(clipRect),
-                      graphicsContext->deviceScaleFactor())
-{
 }
-
-}