Migrate WTF::LinkedHashSet/ListHashSet::add() to ::insert()

third_party/WebKit/Source/core/dom/IntersectionObserver.cpp

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/dom/IntersectionObserver.h"
 
 #include "bindings/core/v8/ExceptionState.h"
 #include "core/css/parser/CSSParserTokenRange.h"
 #include "core/css/parser/CSSTokenizer.h"
 #include "core/dom/Element.h"
@@ skipping 238 matching lines @@
     if (rootFrame != targetFrame) {
       shouldReportRootBounds =
           targetFrame->securityContext()->getSecurityOrigin()->canAccess(
               rootFrame->securityContext()->getSecurityOrigin());
     }
   }
 
   IntersectionObservation* observation =
       new IntersectionObservation(*this, *target, shouldReportRootBounds);
   target->ensureIntersectionObserverData().addObservation(*observation);
-  m_observations.add(observation);
+  m_observations.insert(observation);
   if (FrameView* frameView = targetFrame->view())
     frameView->scheduleAnimation();
 }
 
 void IntersectionObserver::unobserve(Element* target,
                                      ExceptionState& exceptionState) {
   if (!target || !target->intersectionObserverData())
     return;
 
   if (IntersectionObservation* observation =
@@ skipping 78 matching lines @@
 
 DEFINE_TRACE(IntersectionObserver) {
   visitor->template registerWeakMembers<
       IntersectionObserver, &IntersectionObserver::clearWeakMembers>(this);
   visitor->trace(m_callback);
   visitor->trace(m_observations);
   visitor->trace(m_entries);
 }
 
 }  // namespace blink