Replaced HTMLIdentifier with an atomized string factory function

Source/core/html/parser/HTMLIdentifier.cpp

Index: Source/core/html/parser/HTMLIdentifier.cpp
diff --git a/Source/core/html/parser/HTMLIdentifier.cpp b/Source/core/html/parser/HTMLIdentifier.cpp
index 9b91cfc276723168b5271ea677a92bed365baee5..f468aa4a45571a809f2c236ebbc58102b76c70ac 100644
--- a/Source/core/html/parser/HTMLIdentifier.cpp
+++ b/Source/core/html/parser/HTMLIdentifier.cpp
@@ -46,14 +46,6 @@ static IdentifierTable& identifierTable()
     return table;
 }
 
-#ifndef NDEBUG
-bool HTMLIdentifier::isKnown(const StringImpl* string)
-{
-    const IdentifierTable& table = identifierTable();
-    return table.contains(string->hash());
-}
-#endif
-
 StringImpl* HTMLIdentifier::findIfKnown(const UChar* characters, unsigned length)
 {
     // We don't need to try hashing if we know the string is too long.
@@ -76,22 +68,12 @@ StringImpl* HTMLIdentifier::findIfKnown(const UChar* characters, unsigned length
     return it->value;
 }
 
-const String& HTMLIdentifier::asString() const
-{
-    ASSERT(isMainThread());
-    return m_string;
-}
-
-const StringImpl* HTMLIdentifier::asStringImpl() const
-{
-    return m_string.impl();
-}
-
 void HTMLIdentifier::addNames(const QualifiedName* const* names, unsigned namesCount)
 {
     IdentifierTable& table = identifierTable();
     for (unsigned i = 0; i < namesCount; ++i) {
         StringImpl* name = names[i]->localName().impl();
+        ASSERT(name->isStatic());
         unsigned hash = name->hash();
         IdentifierTable::AddResult addResult = table.add(hash, name);
         maxNameLength = std::max(maxNameLength, name->length());