Block scoped const variables.

src/parser.h

Index: src/parser.h
diff --git a/src/parser.h b/src/parser.h
index 8db44bee829a6f1503c5de13481d4604ebd366e1..41b36dd9948cd2f6c7a456a1aa45936b62cec8cf 100644
--- a/src/parser.h
+++ b/src/parser.h
@@ -500,7 +500,6 @@ class Parser {
   Statement* ParseFunctionDeclaration(bool* ok);
   Statement* ParseNativeDeclaration(bool* ok);
   Block* ParseBlock(ZoneStringList* labels, bool* ok);
-  Block* ParseScopedBlock(ZoneStringList* labels, bool* ok);
   Block* ParseVariableStatement(VariableDeclarationContext var_context,
                                 bool* ok);
   Block* ParseVariableDeclarations(VariableDeclarationContext var_context,
@@ -524,6 +523,10 @@ class Parser {
   TryStatement* ParseTryStatement(bool* ok);
   DebuggerStatement* ParseDebuggerStatement(bool* ok);
 
+  // Support for hamony block scoped bindings.
+  Block* ParseScopedBlock(ZoneStringList* labels, bool* ok);
+  Block* ParseHarmonyConstDeclaration(bool* ok);
+
   Expression* ParseExpression(bool accept_IN, bool* ok);
   Expression* ParseAssignmentExpression(bool accept_IN, bool* ok);
   Expression* ParseConditionalExpression(bool accept_IN, bool* ok);