[es6] Parameter scopes for sloppy eval

src/factory.h

Index: src/factory.h
diff --git a/src/factory.h b/src/factory.h
index 0828e81db5177e02b909eaf3c40e1e2cde36acfe..aa49b99b54a2d743afc822433319ef1eab3aa873 100644
--- a/src/factory.h
+++ b/src/factory.h
@@ -54,6 +54,11 @@ class Factory final {
   // Create a new PrototypeInfo struct.
   Handle<PrototypeInfo> NewPrototypeInfo();
 
+  // Create a new SloppyBlockWithEvalContextExtension struct.
+  Handle<SloppyBlockWithEvalContextExtension>
+  NewSloppyBlockWithEvalContextExtension(Handle<ScopeInfo> scope_info,
+                                         Handle<JSObject> extension);
+
   // Create a pre-tenured empty AccessorPair.
   Handle<AccessorPair> NewAccessorPair();