[es8] More spec compliant syntactic tail calls implementation.

src/parsing/parser.h

Index: src/parsing/parser.h
diff --git a/src/parsing/parser.h b/src/parsing/parser.h
index 13b8a276a6485d2282dc382858693470c7cfa5e8..6dfaaa0f79c5516610d2a41457316a39c33e0616 100644
--- a/src/parsing/parser.h
+++ b/src/parsing/parser.h
@@ -572,6 +572,7 @@ class ParserTraits {
                                   bool name_is_strict_reserved, int pos,
                                   bool* ok);
 
+  V8_INLINE void MarkCollectedTailCallExpressions();
   V8_INLINE void MarkTailPosition(Expression* expression);
 
   V8_INLINE void CheckConflictingVarDeclarations(v8::internal::Scope* scope,
@@ -1047,6 +1048,8 @@ class Parser : public ParserBase<ParserTraits> {
   void SetLanguageMode(Scope* scope, LanguageMode mode);
   void RaiseLanguageMode(LanguageMode mode);
 
+  V8_INLINE void MarkCollectedTailCallExpressions();
+
   V8_INLINE void RewriteDestructuringAssignments();
 
   V8_INLINE Expression* RewriteExponentiation(Expression* left,