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

src/ast-expression-visitor.cc

Index: src/ast-expression-visitor.cc
diff --git a/src/ast-expression-visitor.cc b/src/ast-expression-visitor.cc
index 014f56de5335f5d4040cc3546efe66db50495565..782d4bbca6405d6068b03a47705f689168be355e 100644
--- a/src/ast-expression-visitor.cc
+++ b/src/ast-expression-visitor.cc
@@ -79,6 +79,12 @@ void AstExpressionVisitor::VisitExpressionStatement(ExpressionStatement* stmt) {
 void AstExpressionVisitor::VisitEmptyStatement(EmptyStatement* stmt) {}
 
 
+void AstExpressionVisitor::VisitSloppyBlockFunctionStatement(
+    SloppyBlockFunctionStatement* stmt) {
+  RECURSE(Visit(stmt->statement()));
+}
+
+
 void AstExpressionVisitor::VisitIfStatement(IfStatement* stmt) {
   RECURSE(Visit(stmt->condition()));
   RECURSE(Visit(stmt->then_statement()));