Remove source line tracking from MediaList and related DevTools code

Source/core/css/MediaList.cpp

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2006, 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 37 matching lines @@
  * and are consistent with those of media queries used in CSS.
  *
  * HTML5 (at the moment of writing still work in progress) references the Media Queries
  * specification directly and thus updates the rules for HTML.
  *
  * CSS 2.1 Spec (http://www.w3.org/TR/CSS21/media.html)
  * CSS 3 Media Queries Spec (http://www.w3.org/TR/css3-mediaqueries/)
  */
 
 MediaQuerySet::MediaQuerySet()
-    : m_lastLine(0)
 {
 }
 
 MediaQuerySet::MediaQuerySet(const MediaQuerySet& o)
     : RefCounted<MediaQuerySet>()
-    , m_lastLine(o.m_lastLine)
     , m_queries(o.m_queries.size())
 {
     for (unsigned i = 0; i < m_queries.size(); ++i)
         m_queries[i] = o.m_queries[i]->copy();
 }
 
 MediaQuerySet::~MediaQuerySet()
 {
 }
 
@@ skipping 227 matching lines @@
                     CSSPrimitiveValue* primitiveValue = toCSSPrimitiveValue(cssValue);
                     if (primitiveValue->isDotsPerInch() || primitiveValue->isDotsPerCentimeter())
                         addResolutionWarningMessageToConsole(document, mediaQuerySet->mediaText(), primitiveValue);
                 }
             }
         }
     }
 }
 
 }