Add <link rel=preconnect> support to the HTMLPreloadScanner

Source/core/html/parser/HTMLDocumentParser.cpp

Index: Source/core/html/parser/HTMLDocumentParser.cpp
diff --git a/Source/core/html/parser/HTMLDocumentParser.cpp b/Source/core/html/parser/HTMLDocumentParser.cpp
index 5fa1975ebf40a4a712dd6115436d7b06cfd5caf2..5d7d23be2191a7a4ace420c5d004ac666bb2bd8b 100644
--- a/Source/core/html/parser/HTMLDocumentParser.cpp
+++ b/Source/core/html/parser/HTMLDocumentParser.cpp
@@ -665,7 +665,8 @@ void HTMLDocumentParser::pumpTokenizer()
             if (!m_preloadScanner) {
                 m_preloadScanner = adoptPtr(new HTMLPreloadScanner(m_options,
                     document()->url(),
-                    CachedDocumentParameters::create(document())));
+                    CachedDocumentParameters::create(document()),
+                    Preconnecter::create()));
                 m_preloadScanner->appendToEnd(m_input.current());
             }
             m_preloadScanner->scan(m_preloader.get(), document()->baseElementURL());
@@ -749,7 +750,8 @@ void HTMLDocumentParser::insert(const SegmentedString& source)
         if (!m_insertionPreloadScanner) {
             m_insertionPreloadScanner = adoptPtr(new HTMLPreloadScanner(m_options,
                 document()->url(),
-                CachedDocumentParameters::create(document())));
+                CachedDocumentParameters::create(document()),
+                Preconnecter::create()));
         }
 
         m_insertionPreloadScanner->appendToEnd(source);
@@ -781,7 +783,7 @@ void HTMLDocumentParser::startBackgroundParser()
     config->parser = m_weakFactory.createWeakPtr();
     config->xssAuditor = adoptPtr(new XSSAuditor);
     config->xssAuditor->init(document(), &m_xssAuditorDelegate);
-    config->preloadScanner = adoptPtr(new TokenPreloadScanner(document()->url().copy(), CachedDocumentParameters::create(document())));
+    config->preloadScanner = adoptPtr(new TokenPreloadScanner(document()->url().copy(), CachedDocumentParameters::create(document()), Preconnecter::create()));
     config->decoder = takeDecoder();
 
     ASSERT(config->xssAuditor->isSafeToSendToAnotherThread());