Implement sloppy-mode block-defined functions (Annex B 3.3)

src/parser.h

Index: src/parser.h
diff --git a/src/parser.h b/src/parser.h
index 29dbb099547fe88073c659017b44ab8bb796cbfa..cf4cdad66bba7d1cf5c61021f65cedf73a02201e 100644
--- a/src/parser.h
+++ b/src/parser.h
@@ -1134,6 +1134,9 @@ class Parser : public ParserBase<ParserTraits> {
   // hoisted over such a scope.
   void CheckConflictingVarDeclarations(Scope* scope, bool* ok);
 
+  // Implement sloppy block-scoped functions, ES2015 Annex B 3.3
+  void InsertSloppyBlockFunctionVarBindings(Scope* scope, bool* ok);
+
   // Parser support
   VariableProxy* NewUnresolved(const AstRawString* name, VariableMode mode);
   Variable* Declare(Declaration* declaration,