Migrate WTF::HashSet::add() to ::insert() [part 1 of N]

third_party/WebKit/Source/core/layout/LayoutBlockFlow.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 1244 matching lines @@
     m_floatingObjects->setHorizontalWritingMode(isHorizontalWritingMode());
 
   HashSet<LayoutBox*> oldIntrudingFloatSet;
   if (!childrenInline() && m_floatingObjects) {
     const FloatingObjectSet& floatingObjectSet = m_floatingObjects->set();
     FloatingObjectSetIterator end = floatingObjectSet.end();
     for (FloatingObjectSetIterator it = floatingObjectSet.begin(); it != end;
          ++it) {
       const FloatingObject& floatingObject = *it->get();
       if (!floatingObject.isDescendant())
-        oldIntrudingFloatSet.add(floatingObject.layoutObject());
+        oldIntrudingFloatSet.insert(floatingObject.layoutObject());
     }
   }
 
   // Inline blocks are covered by the isAtomicInlineLevel() check in the
   // avoidFloats method.
   if (avoidsFloats() || isDocumentElement() || isLayoutView() ||
       isFloatingOrOutOfFlowPositioned() || isTableCell()) {
     if (m_floatingObjects) {
       m_floatingObjects->clear();
     }
@@ skipping 3322 matching lines @@
   return LayoutBlock::invalidatePaintIfNeeded(paintInvalidationState);
 }
 
 void LayoutBlockFlow::invalidateDisplayItemClients(
     PaintInvalidationReason invalidationReason) const {
   BlockFlowPaintInvalidator(*this).invalidateDisplayItemClients(
       invalidationReason);
 }
 
 }  // namespace blink