Broaden NSME check

lib/compiler/implementation/lib/js_helper.dart

Index: lib/compiler/implementation/lib/js_helper.dart
diff --git a/lib/compiler/implementation/lib/js_helper.dart b/lib/compiler/implementation/lib/js_helper.dart
index 7fe30c955972365a8b45593551be418836ff75a0..b969c9d4e621241ded0e0b8e6ca8b7b19023fd1e 100644
--- a/lib/compiler/implementation/lib/js_helper.dart
+++ b/lib/compiler/implementation/lib/js_helper.dart
@@ -815,7 +815,9 @@ unwrapException(ex) {
           message.endsWith('is undefined') ||
           message.endsWith('is null or undefined')) {
         return new NullPointerException();
-      } else if (message.endsWith('is not a function')) {
+      } else if (message.contains(' is not a function')) {
+        //  x.foo is not a function
+        //  'undefined' is not a function (evaluating 'x.foo(1,2,3)')
         // TODO(kasperl): Compute the right name if possible.
         return new NoSuchMethodException('', '<unknown>', []);
       }