Sending scope types and object refs costs nothing but would save us request...

Sending scope types and object refs costs nothing but would save us request that should be send to retrieve scopes informations for each frame in 'backtrace' response.
Review URL: http://codereview.chromium.org/131107

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@2237 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/mirror-delay.js

@@ -2232,6 +2232,15 @@ JSONProtocolSerializer.prototype.serializeFrame_ = function(mirror, content) {
   if (!IS_UNDEFINED(source_line_text)) {
     content.sourceLineText = source_line_text;
   }
+  
+  content.scopes = [];
+  for (var i = 0; i < mirror.scopeCount(); i++) {
+    var scope = mirror.scope(i);
+    content.scopes.push({
+      type: scope.scopeType(),
+      index: i
+    });
+  }
 }