Let page zoom affect resolution and -webkit-device-pixel-ratio MQs.

Source/core/page/Frame.h

 /*
  * Copyright (C) 1998, 1999 Torben Weis <weis@kde.org>
  *                     1999-2001 Lars Knoll <knoll@kde.org>
  *                     1999-2001 Antti Koivisto <koivisto@kde.org>
  *                     2000-2001 Simon Hausmann <hausmann@kde.org>
  *                     2000-2001 Dirk Mueller <mueller@kde.org>
  *                     2000 Stefan Schimanski <1Stein@gmx.de>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2008 Eric Seidel <eric@webkit.org>
@@ skipping 117 matching lines @@
         bool inViewSourceMode() const;
         void setInViewSourceMode(bool = true);
 
         void setPageZoomFactor(float factor);
         float pageZoomFactor() const { return m_pageZoomFactor; }
         void setTextZoomFactor(float factor);
         float textZoomFactor() const { return m_textZoomFactor; }
         void setPageAndTextZoomFactors(float pageZoomFactor, float textZoomFactor);
 
         void deviceOrPageScaleFactorChanged();
+        double devicePixelRatio() const;
 
 #if ENABLE(ORIENTATION_EVENTS)
         // Orientation is the interface orientation in degrees. Some examples are:
         //  0 is straight up; -90 is when the device is rotated 90 clockwise;
         //  90 is when rotated counter clockwise.
         void sendOrientationChangeEvent(int orientation);
         int orientation() const { return m_orientation; }
 #endif
 
         void clearTimers();
@@ skipping 127 matching lines @@
     }
 
     inline EventHandler* Frame::eventHandler() const
     {
         return m_eventHandler.get();
     }
 
 } // namespace WebCore
 
 #endif // Frame_h