Change setIsLink to conform with other nonproperty setters.

third_party/WebKit/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/)
@@ skipping 673 matching lines @@
   // contenteditable attribute (implemented by -webkit-user-modify) should
   // be propagated from shadow host to distributed node.
   if (state.distributedToInsertionPoint()) {
     if (Element* parent = element->parentElement()) {
       if (ComputedStyle* styleOfShadowHost = parent->mutableComputedStyle())
         state.style()->setUserModify(styleOfShadowHost->userModify());
     }
   }
 
   if (element->isLink()) {
-    state.style()->setIsLink(true);
+    state.style()->setIsLink();
     EInsideLink linkState = state.elementLinkState();
     if (linkState != EInsideLink::kNotInsideLink) {
       bool forceVisited = InspectorInstrumentation::forcePseudoState(
           element, CSSSelector::PseudoVisited);
       if (forceVisited)
         linkState = EInsideLink::kInsideVisitedLink;
     }
     state.style()->setInsideLink(linkState);
   }
 
@@ skipping 1230 matching lines @@
 
 DEFINE_TRACE(StyleResolver) {
   visitor->trace(m_matchedPropertiesCache);
   visitor->trace(m_selectorFilter);
   visitor->trace(m_styleSharingLists);
   visitor->trace(m_document);
   visitor->trace(m_tracker);
 }
 
 }  // namespace blink