Use new is*Element() helper functions in CSS code

Source/core/css/resolver/StyleResolver.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 2004-2005 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2006, 2007 Nicholas Shanks (webkit@nickshanks.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
  * Copyright (C) 2007, 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (c) 2011, Code Aurora Forum. All rights reserved.
  * Copyright (C) Research In Motion Limited 2011. All rights reserved.
@@ skipping 700 matching lines @@
         StyleAdjuster adjuster(state.cachedUAStyle(), m_document.inQuirksMode());
         adjuster.adjustRenderStyle(state.style(), state.parentStyle(), element);
     }
 
     // FIXME: The CSSWG wants to specify that the effects of animations are applied before
     // important rules, but this currently happens here as we require adjustment to have happened
     // before deciding which properties to transition.
     applyAnimatedProperties(state, element);
 
     // FIXME: Shouldn't this be on RenderBody::styleDidChange?
-    if (element->hasTagName(bodyTag))
+    if (isHTMLBodyElement(*element))
         document().textLinkColors().setTextColor(state.style()->color());
 
     setAnimationUpdateIfNeeded(state, *element);
 
     if (state.style()->hasViewportUnits())
         document().setHasViewportUnits();
 
     // Now return the style.
     return state.takeStyle();
 }
@@ skipping 676 matching lines @@
 bool StyleResolver::mediaQueryAffectedByViewportChange() const
 {
     for (unsigned i = 0; i < m_viewportDependentMediaQueryResults.size(); ++i) {
         if (m_medium->eval(&m_viewportDependentMediaQueryResults[i]->m_expression) != m_viewportDependentMediaQueryResults[i]->m_result)
             return true;
     }
     return false;
 }
 
 } // namespace WebCore