Run HTMLSourceTracker hooks only when XSSAuditor is enabled

Source/core/html/parser/BackgroundHTMLParser.cpp

Index: Source/core/html/parser/BackgroundHTMLParser.cpp
diff --git a/Source/core/html/parser/BackgroundHTMLParser.cpp b/Source/core/html/parser/BackgroundHTMLParser.cpp
index 6bbde221f630ccffd2b751657d30d90b8b94c09b..024946cd8e1e3378d4bcc45c5d54d308222d62c4 100644
--- a/Source/core/html/parser/BackgroundHTMLParser.cpp
+++ b/Source/core/html/parser/BackgroundHTMLParser.cpp
@@ -223,13 +223,17 @@ void BackgroundHTMLParser::pumpTokenizer()
         return;
 
     while (true) {
-        m_sourceTracker.start(m_input.current(), m_tokenizer.get(), *m_token);
+        if (m_xssAuditor->isEnabled())
+            m_sourceTracker.start(m_input.current(), m_tokenizer.get(), *m_token);
+
         if (!m_tokenizer->nextToken(m_input.current(), *m_token)) {
             // We've reached the end of our current input.
             sendTokensToMainThread();
             break;
         }
-        m_sourceTracker.end(m_input.current(), m_tokenizer.get(), *m_token);
+
+        if (m_xssAuditor->isEnabled())
+            m_sourceTracker.end(m_input.current(), m_tokenizer.get(), *m_token);
 
         {
             TextPosition position = TextPosition(m_input.current().currentLine(), m_input.current().currentColumn());
@@ -239,7 +243,7 @@ void BackgroundHTMLParser::pumpTokenizer()
                 m_pendingXSSInfos.append(xssInfo.release());
             }
 
-            CompactHTMLToken token(m_token.get(), TextPosition(m_input.current().currentLine(), m_input.current().currentColumn()));
+            CompactHTMLToken token(m_token.get(), position);
 
             m_preloadScanner->scan(token, m_input.current(), m_pendingPreloads);
             simulatedToken = m_treeBuilderSimulator.simulate(token, m_tokenizer.get());