Refactor StyleInvalidator to encapsulate all style invalidation state.

Source/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 1572 matching lines @@
 
 void Document::updateStyleInvalidationIfNeeded()
 {
     if (!isActive())
         return;
     if (!childNeedsStyleInvalidation())
         return;
     TRACE_EVENT0("webkit", "Document::computeNeedsStyleRecalcState");
     ASSERT(styleResolver());
 
-    StyleInvalidator(*this).invalidate();
+    styleResolver()->ruleFeatureSet().styleInvalidator().invalidate(*this);

[esprehn, 2014/03/31 18:20:39]

This is really silly to reach so far down, you should encapsulate this with an
API on StyleResolver.

See also http://en.wikipedia.org/wiki/Law_of_Demeter

[chrishtr, 2014/03/31 19:22:59]

Don't disagree. This CL is one step towards that.

 }
 
 void Document::updateDistributionForNodeIfNeeded(Node* node)
 {
     if (node->inDocument()) {
         updateDistributionIfNeeded();
         return;
     }
     Node* root = node;
     while (Node* host = root->shadowHost())
@@ skipping 3888 matching lines @@
 }
 
 void Document::invalidateNodeListCaches(const QualifiedName* attrName)
 {
     HashSet<LiveNodeListBase*>::iterator end = m_listsInvalidatedAtDocument.end();
     for (HashSet<LiveNodeListBase*>::iterator it = m_listsInvalidatedAtDocument.begin(); it != end; ++it)
         (*it)->invalidateCache(attrName);
 }
 
 } // namespace WebCore