Ship ES2015 sloppy-mode const semantics

test/webkit/constant-count.js

Index: test/webkit/constant-count.js
diff --git a/test/webkit/constant-count.js b/test/webkit/constant-count.js
index 7bc67e799b7fe606b020564f088377071d35db76..2e1ec5b92d1c4673c71e7c2475adc7b9370caa7f 100644
--- a/test/webkit/constant-count.js
+++ b/test/webkit/constant-count.js
@@ -21,6 +21,8 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+// Flags: --legacy-const
+
 description(
 "This test checks exceptional cases for constant counting in the parser."
 );