Remove dirtyTreeScopes tracking code from StyleEngine.

sky/engine/core/dom/Document.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2008, 2009, 2011, 2012 Google Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) Research In Motion Limited 2010-2011. All rights reserved.
@@ skipping 2679 matching lines @@
 DocumentLifecycleNotifier& Document::lifecycleNotifier()
 {
     return static_cast<DocumentLifecycleNotifier&>(LifecycleContext<Document>::lifecycleNotifier());
 }
 
 void Document::removedStyleSheet(CSSStyleSheet* sheet)
 {
     // If we're in document teardown, then we don't need this notification of our sheet's removal.
     // styleResolverChanged() is needed even when the document is inactive so that
     // imported docuements (which is inactive) notifies the change to the master document.
-    if (isActive())
-        styleEngine()->modifiedStyleSheet(sheet);
     styleResolverChanged();
 }
 
 void Document::modifiedStyleSheet(CSSStyleSheet* sheet)
 {
     // If we're in document teardown, then we don't need this notification of our sheet's removal.
     // styleResolverChanged() is needed even when the document is inactive so that
     // imported docuements (which is inactive) notifies the change to the master document.
-    if (isActive())
-        styleEngine()->modifiedStyleSheet(sheet);
     styleResolverChanged();
 }
 
 Element* Document::activeElement() const
 {
     if (Element* element = treeScope().adjustedFocusedElement())
         return element;
     return documentElement();
 }
 
@@ skipping 45 matching lines @@
 using namespace blink;
 void showLiveDocumentInstances()
 {
     WeakDocumentSet& set = liveDocumentSet();
     fprintf(stderr, "There are %u documents currently alive:\n", set.size());
     for (WeakDocumentSet::const_iterator it = set.begin(); it != set.end(); ++it) {
         fprintf(stderr, "- Document %p URL: %s\n", *it, (*it)->url().string().utf8().data());
     }
 }
 #endif