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

third_party/WebKit/Source/wtf/text/AtomicStringTable.cpp

Index: third_party/WebKit/Source/wtf/text/AtomicStringTable.cpp
diff --git a/third_party/WebKit/Source/wtf/text/AtomicStringTable.cpp b/third_party/WebKit/Source/wtf/text/AtomicStringTable.cpp
index c5126ab222debbe2415b7c04a54bb976bb7cd403..7ca6f715c50b3225480b9a6c951e788cf137a2c7 100644
--- a/third_party/WebKit/Source/wtf/text/AtomicStringTable.cpp
+++ b/third_party/WebKit/Source/wtf/text/AtomicStringTable.cpp
@@ -188,7 +188,7 @@ StringImpl* AtomicStringTable::add(StringImpl* string) {
   if (!string->length())
     return StringImpl::empty();
 
-  StringImpl* result = *m_table.add(string).storedValue;
+  StringImpl* result = *m_table.insert(string).storedValue;
 
   if (!result->isAtomic())
     result->setIsAtomic(true);