ES6: Add Object.getOwnPropertySymbols

src/mirror-debugger.js

Index: src/mirror-debugger.js
diff --git a/src/mirror-debugger.js b/src/mirror-debugger.js
index 4277136b609265b8f64515c6842a778fb139fc56..62222052dd4f5729602e40b913e9f60d767f27a2 100644
--- a/src/mirror-debugger.js
+++ b/src/mirror-debugger.js
@@ -638,13 +638,16 @@ ObjectMirror.prototype.propertyNames = function(kind, limit) {
   // Find all the named properties.
   if (kind & PropertyKind.Named) {
     // Get the local property names.
-    propertyNames = %GetLocalPropertyNames(this.value_, true);
+    propertyNames =
+        %GetLocalPropertyNames(this.value_,
+            PROPERTY_KEY_STRING | PROPERTY_KEY_SYMBOL);
     total += propertyNames.length;
 
     // Get names for named interceptor properties if any.
     if (this.hasNamedInterceptor() && (kind & PropertyKind.Named)) {
       var namedInterceptorNames =
-          %GetNamedInterceptorPropertyNames(this.value_);
+          %GetNamedInterceptorPropertyNames(this.value_,
+              PROPERTY_KEY_STRING | PROPERTY_KEY_SYMBOL);
       if (namedInterceptorNames) {
         propertyNames = propertyNames.concat(namedInterceptorNames);
         total += namedInterceptorNames.length;