Remove source line tracking from MediaList and related DevTools code

Source/core/inspector/InspectorCSSAgent.cpp

 /*
  * Copyright (C) 2010, Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
  *     notice, this list of conditions and the following disclaimer in the
@@ skipping 1198 matching lines @@
         source = TypeBuilder::CSS::CSSMedia::Source::InlineSheet;
         break;
     }
 
     RefPtr<TypeBuilder::CSS::CSSMedia> mediaObject = TypeBuilder::CSS::CSSMedia::create()
         .setText(media->mediaText())
         .setSource(source);
 
     if (!sourceURL.isEmpty()) {
         mediaObject->setSourceURL(sourceURL);
-        mediaObject->setSourceLine(media->queries()->lastLine());
 
         CSSRule* parentRule = media->parentRule();
         if (!parentRule)
             return mediaObject.release();
         InspectorStyleSheet* inspectorStyleSheet = bindStyleSheet(const_cast<CSSStyleSheet*>(parentRule->parentStyleSheet()));
         RefPtr<TypeBuilder::CSS::SourceRange> mediaRange = inspectorStyleSheet->ruleHeaderSourceRange(parentRule);
         if (mediaRange)
             mediaObject->setRange(mediaRange);
     }
     return mediaObject.release();
@@ skipping 459 matching lines @@
             documentsToChange.add(element->ownerDocument());
     }
 
     m_nodeIdToForcedPseudoState.clear();
     for (HashSet<Document*>::iterator it = documentsToChange.begin(), end = documentsToChange.end(); it != end; ++it)
         (*it)->styleResolverChanged(RecalcStyleImmediately);
 }
 
 } // namespace WebCore