Down-integrate internal changes to github.
diff --git a/js/binary/constants.js b/js/binary/constants.js
index 5c53a36..f8b13a8 100644
--- a/js/binary/constants.js
+++ b/js/binary/constants.js
@@ -55,7 +55,7 @@
 goog.forwardDeclare('jspb.BinaryReader');
 goog.forwardDeclare('jspb.BinaryWriter');
 goog.forwardDeclare('jspb.Message');
-goog.forwardDeclare('jsproto.BinaryExtension');
+goog.forwardDeclare('jsprotolib.BinaryExtension');
 
 
 
@@ -122,7 +122,7 @@
              !Uint8Array|
              !jspb.ConstBinaryMessage|
              !jspb.BinaryMessage|
-             !jsproto.BinaryExtension}
+             !jsprotolib.BinaryExtension}
  */
 jspb.AnyFieldType;