Cloning a bunch of stuff from the native_client repository at r6528

ppapi/native_client/tests/ppapi_browser/bad/ppapi_bad.js

+// Helper routines for generating bad load tests.
+// Webpage must have an 'embeds' div for injecting NaCl modules.
+// Depends on nacltest.js.
+
+function createModule(id, src) {
+  return createNaClEmbed({
+    id: id,
+    src: src,
+    width: 100,
+    height: 20
+  });
+}
+
+
+function addModule(module) {
+  $('embeds').appendChild(module);
+}
+
+
+function removeModule(module) {
+  $('embeds').removeChild(module);
+}
+
+
+function badLoadTest(tester, id, src, error_string) {
+  tester.addAsyncTest(id, function(test){
+    var module = createModule(id, src);
+
+    test.expectEvent(module, 'load', function(e) {
+      removeModule(module);
+      test.fail('Module loaded successfully.');
+    });
+    test.expectEvent(module, 'error', function(e) {
+      test.assertEqual(module.readyState, 4);
+      test.assertEqual(module.lastError, error_string);
+      test.expectEvent(module, 'loadend', function(e) {
+        removeModule(module);
+        test.pass();
+      });
+    });
+    addModule(module);
+  });
+}