Add an accessibility audit test for WebUI pages

chrome/browser/ui/webui/web_ui_test_handler.cc

 // Copyright (c) 2012 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 "chrome/browser/ui/webui/web_ui_test_handler.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/utf_string_conversions.h"
 #include "base/values.h"
@@ skipping 57 matching lines @@
   EXPECT_FALSE(test_done_);
   test_done_ = true;
   test_succeeded_ = false;
 
   ASSERT_TRUE(test_result->GetBoolean(0, &test_succeeded_));
   if (!test_succeeded_) {
     std::string message;
     ASSERT_TRUE(test_result->GetString(1, &message));
     LOG(ERROR) << message;
   }
+
+  if (test_result->GetSize() > 2) {

[Sheridan Rawlins, 2012/12/18 01:43:35]

This won't be needed if you do the console.warn stuff we talked about, otherwise
let errors be errors if a11yIssuesAreErrors.

+    std::string a11y_message;
+    ASSERT_TRUE(test_result->GetString(2, &a11y_message));
+    LOG(ERROR) << a11y_message;
+  } else {
+    LOG(ERROR) << "a11y passed";
+  }
 }
 
 void WebUITestHandler::Observe(int type,
                                const content::NotificationSource& source,
                                const content::NotificationDetails& details) {
   // Quit the message loop if |is_waiting_| so waiting process can get result or
   // error. To ensure this gets done, do this before ASSERT* calls.
   if (is_waiting_)
     MessageLoopForUI::current()->Quit();
 
@@ skipping 24 matching lines @@
   // complete.
   if (!run_test_done_ || (run_test_succeeded_ && !test_done_)) {
     content::RunMessageLoop();
   }
 
   is_waiting_ = false;
 
   // To succeed the test must execute as well as pass the test.
   return run_test_succeeded_ && test_succeeded_;
 }