Remove threading primitives from ParseHTMLOnMainThread

third_party/WebKit/Source/core/html/parser/HTMLDocumentParser.h

Index: third_party/WebKit/Source/core/html/parser/HTMLDocumentParser.h
diff --git a/third_party/WebKit/Source/core/html/parser/HTMLDocumentParser.h b/third_party/WebKit/Source/core/html/parser/HTMLDocumentParser.h
index 3ba0b5e6f566e5b4fe8219e8f40a57705ea320dc..63f8df540d8ba0a7db95b9ecf945e44df4d2db64 100644
--- a/third_party/WebKit/Source/core/html/parser/HTMLDocumentParser.h
+++ b/third_party/WebKit/Source/core/html/parser/HTMLDocumentParser.h
@@ -188,10 +188,12 @@ private:
         Asynchronous,
     };
 
-    // Setting |sync| to true will just call the closure. Note, this method is
-    // completely temporary as we need to maintain both threading
-    // implementations until the ParseHTMLOnMainThread experiment finishes.
-    void postTaskToLookaheadParser(std::unique_ptr<CrossThreadClosure>, LookaheadParserTaskSynchrony = Asynchronous);
+    // Setting |synchronyPolicy| to Synchronous will just call the function
+    // with the given parameters. Note, this method is completely temporary
+    // as we need to maintain both threading implementations until the
+    // ParseHTMLOnMainThread experiment finishes.
+    template <typename FunctionType, typename... Ps>
+    void postTaskToLookaheadParser(LookaheadParserTaskSynchrony synchronyPolicy, FunctionType, Ps&&... parameters);
 
     HTMLToken& token() { return *m_token; }