Mojo JS validation unit test should check Connection et al

mojo/public/js/bindings/router.js

Index: mojo/public/js/bindings/router.js
diff --git a/mojo/public/js/bindings/router.js b/mojo/public/js/bindings/router.js
index efb5eb0e6ab211abce254e213d1cdc8599e347ae..34d7efd69a94e9247be22917a30d4e91140acab8 100644
--- a/mojo/public/js/bindings/router.js
+++ b/mojo/public/js/bindings/router.js
@@ -71,9 +71,14 @@ define("mojo/public/js/bindings/router", [
     var err = messageValidator.validateMessageHeader();
     for (var i = 0; err === noError && i < this.payloadValidators_.length; ++i)
       err = this.payloadValidators_[i](messageValidator);
-    if (err !== noError)
-      this.close();
 
+    if (err == noError)
+      this.handleValidIncomingMessage_(message);
+    else
+      this.handleInvalidIncomingMessage_(message, err);
+  };
+
+  Router.prototype.handleValidIncomingMessage_ = function(message) {
     if (message.expectsResponse()) {
       if (this.incomingReceiver_) {
         this.incomingReceiver_.acceptWithResponder(message, this);
@@ -92,7 +97,11 @@ define("mojo/public/js/bindings/router", [
       if (this.incomingReceiver_)
         this.incomingReceiver_.accept(message);
     }
-  };
+  }
+
+  Router.prototype.handleInvalidIncomingMessage_ = function(message, error) {
+    this.close();
+  }
 
   Router.prototype.handleConnectionError_ = function(result) {
     for (var each in this.responders_)