Remove source line tracking from MediaList and related DevTools code

Source/core/css/MediaList.h

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2006, 2008, 2009, 2010, 2012 Apple Inc. All rights reserved.
  *
  * 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 35 matching lines @@
     ~MediaQuerySet();
 
     bool set(const String&);
     bool add(const String&);
     bool remove(const String&);
 
     void addMediaQuery(PassOwnPtr<MediaQuery>);
 
     const Vector<OwnPtr<MediaQuery> >& queryVector() const { return m_queries; }
 
-    int lastLine() const { return m_lastLine; }
-    void setLastLine(int lastLine) { m_lastLine = lastLine; }
-
     String mediaText() const;
 
     PassRefPtr<MediaQuerySet> copy() const { return adoptRef(new MediaQuerySet(*this)); }
 
     void reportMemoryUsage(MemoryObjectInfo*) const;
 
 private:
     MediaQuerySet();
     MediaQuerySet(const MediaQuerySet&);
 
-    unsigned m_lastLine;
     Vector<OwnPtr<MediaQuery> > m_queries;
 };
 
 class MediaList : public RefCounted<MediaList> {
 public:
     static PassRefPtr<MediaList> create(MediaQuerySet* mediaQueries, CSSStyleSheet* parentSheet)
     {
         return adoptRef(new MediaList(mediaQueries, parentSheet));
     }
     static PassRefPtr<MediaList> create(MediaQuerySet* mediaQueries, CSSRule* parentRule)
@@ skipping 31 matching lines @@
     CSSStyleSheet* m_parentStyleSheet;
     CSSRule* m_parentRule;
 };
 
 // Adds message to inspector console whenever dpi or dpcm values are used for "screen" media.
 void reportMediaQueryWarningIfNeeded(Document*, const MediaQuerySet*);
 
 } // namespace
 
 #endif