Add validation test cases for struct versioning.

mojo/public/js/validation_unittests.js

Index: mojo/public/js/validation_unittests.js
diff --git a/mojo/public/js/validation_unittests.js b/mojo/public/js/validation_unittests.js
index 8a1f385f4518403b7c8ac7cad64d1571f9b6ad57..a04879cd4b00f3bda1d466b88837bcdcae35371d 100644
--- a/mojo/public/js/validation_unittests.js
+++ b/mojo/public/js/validation_unittests.js
@@ -225,8 +225,11 @@ define([
     expect(testFiles.length).toBeGreaterThan(0);
 
     for (var i = 0; i < testFiles.length; i++) {
-      // TODO(hansmuller): Temporarily skipping array pointer overflow tests.
-      if (testFiles[i].indexOf("overflow") != -1) {
+      // TODO(hansmuller, yzshen): Temporarily skipping:
+      //   - array pointer overflow tests;
+      //   - struct versioning tests (tests with "mthd11" in the name).
+      if (testFiles[i].indexOf("overflow") != -1 ||
+          testFiles[i].indexOf("mthd11") != -1) {
         console.log("[Skipping " + testFiles[i] + "]");
         continue;
       }
@@ -249,11 +252,6 @@ define([
         testInterface.ConformanceTestInterface.validateRequest]);
   }
 
-  function testNotImplementedMessageValidation() {
-    testMessageValidation("not_implemented_", [
-        testInterface.ConformanceTestInterface.validateRequest]);
-  }
-
   function testIntegratedMessageValidation(testFilesPattern) {
     var testFiles = getMessageTestFiles(testFilesPattern);
     expect(testFiles.length).toBeGreaterThan(0);