Fix PPAPI ui_tests.

ppapi/tests/testing_instance.cc

 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ppapi/tests/testing_instance.h"
 
 #include <algorithm>
 #include <cstring>
 #include <vector>
 
@@ skipping 94 matching lines @@
   pp::Var window = GetWindowObject();
   window.GetProperty("document").
       Call("getElementById", "console").SetProperty("innerHTML", "");
 
   if (!errors_.empty()) {
     // Catch initialization errors and output the current error string to
     // the console.
     LogError("Plugin initialization failed: " + errors_);
   } else if (!current_case_) {
     LogAvailableTests();
+    errors_.append("FAIL: Only listed tests");
   } else {
     current_case_->RunTest();
   }
 
   // Declare we're done by setting a cookie to either "PASS" or the errors.
   SetCookie("COMPLETION_COOKIE", errors_.empty() ? "PASS" : errors_);
 
   window.Call("DidExecuteTests");
 }
 
@@ skipping 67 matching lines @@
   }
 };
 
 namespace pp {
 
 Module* CreateModule() {
   return new ::Module();
 }
 
 }  // namespace pp