Migrate WTF::HashSet::add() to ::insert() [part 2 of N]

third_party/WebKit/Source/core/css/ActiveStyleSheets.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/css/ActiveStyleSheets.h"
 
 #include "core/css/CSSStyleSheet.h"
 #include "core/css/RuleSet.h"
 #include "core/css/resolver/ScopedStyleResolver.h"
 #include "core/dom/ContainerNode.h"
@@ skipping 26 matching lines @@
       changedRuleSets.insert(oldStyleSheets[index].second);
   }
 
   if (index == oldStyleSheetCount) {
     // The old stylesheet vector is a prefix of the new vector in terms of
     // StyleSheets. If none of the RuleSets changed, we only need to add the new
     // sheets to the ScopedStyleResolver (ActiveSheetsAppended).
     bool ruleSetsChangedInCommonPrefix = !changedRuleSets.isEmpty();
     for (; index < newStyleSheetCount; index++) {
       if (newStyleSheets[index].second)
-        changedRuleSets.add(newStyleSheets[index].second);
+        changedRuleSets.insert(newStyleSheets[index].second);
     }
     if (ruleSetsChangedInCommonPrefix)
       return ActiveSheetsChanged;
     if (changedRuleSets.isEmpty())
       return NoActiveSheetsChanged;
     return ActiveSheetsAppended;
   }
 
   if (index == newStyleSheetCount) {
     // Sheets removed from the end.
     for (; index < oldStyleSheetCount; index++) {
       if (oldStyleSheets[index].second)
-        changedRuleSets.add(oldStyleSheets[index].second);
+        changedRuleSets.insert(oldStyleSheets[index].second);
     }
     return changedRuleSets.isEmpty() ? NoActiveSheetsChanged
                                      : ActiveSheetsChanged;
   }
 
   DCHECK(index < oldStyleSheetCount && index < newStyleSheetCount);
 
   // Both the new and old active stylesheet vectors have stylesheets following
   // the common prefix. Figure out which were added or removed by sorting the
   // merged vector of old and new sheets.
 
   ActiveStyleSheetVector mergedSorted;
   mergedSorted.reserveCapacity(oldStyleSheetCount + newStyleSheetCount -
                                2 * index);
   mergedSorted.appendRange(oldStyleSheets.begin() + index,
                            oldStyleSheets.end());
   mergedSorted.appendRange(newStyleSheets.begin() + index,
                            newStyleSheets.end());
 
   std::sort(mergedSorted.begin(), mergedSorted.end());
 
   auto mergedIterator = mergedSorted.begin();
   while (mergedIterator != mergedSorted.end()) {
     const auto& sheet1 = *mergedIterator++;
     if (mergedIterator == mergedSorted.end() ||
         (*mergedIterator).first != sheet1.first) {
       // Sheet either removed or inserted.
       if (sheet1.second)
-        changedRuleSets.add(sheet1.second);
+        changedRuleSets.insert(sheet1.second);
       continue;
     }
 
     // Sheet present in both old and new.
     const auto& sheet2 = *mergedIterator++;
 
     if (sheet1.second == sheet2.second)
       continue;
 
     // Active rules for the given stylesheet changed.
     // DOM, CSSOM, or media query changes.
     if (sheet1.second)
-      changedRuleSets.add(sheet1.second);
+      changedRuleSets.insert(sheet1.second);
     if (sheet2.second)
-      changedRuleSets.add(sheet2.second);
+      changedRuleSets.insert(sheet2.second);
   }
   return changedRuleSets.isEmpty() ? NoActiveSheetsChanged
                                    : ActiveSheetsChanged;
 }
 
 }  // namespace blink