Removed need to use "backtrack" in grammar.
diff --git a/com.google.eclipse.protobuf/META-INF/MANIFEST.MF b/com.google.eclipse.protobuf/META-INF/MANIFEST.MF
index 4f92713..54b2e6e 100644
--- a/com.google.eclipse.protobuf/META-INF/MANIFEST.MF
+++ b/com.google.eclipse.protobuf/META-INF/MANIFEST.MF
@@ -24,6 +24,7 @@
  com.google.eclipse.protobuf.conversion,

  com.google.eclipse.protobuf.grammar,

  com.google.eclipse.protobuf.model.util,

+ com.google.eclipse.protobuf.naming,

  com.google.eclipse.protobuf.parseTreeConstruction,

  com.google.eclipse.protobuf.parser.antlr,

  com.google.eclipse.protobuf.parser.antlr.internal,