Add an accessibility audit test for WebUI pages

chrome/browser/ui/webui/web_ui_browsertest.cc

Index: chrome/browser/ui/webui/web_ui_browsertest.cc
diff --git a/chrome/browser/ui/webui/web_ui_browsertest.cc b/chrome/browser/ui/webui/web_ui_browsertest.cc
index 0f40c014336a75d72fcf2760b64953ac0fcd53e7..9f4e369da710f3a03e0dfc9948fa2a2c0de272f5 100644
--- a/chrome/browser/ui/webui/web_ui_browsertest.cc
+++ b/chrome/browser/ui/webui/web_ui_browsertest.cc
@@ -46,7 +46,11 @@ using content::WebUIMessageHandler;
 
 namespace {
 
+const FilePath::CharType kMockJSPath[] =
+    FILE_PATH_LITERAL("chrome/third_party/mock4js/mock4js.js");
 const FilePath::CharType kMockJS[] = FILE_PATH_LITERAL("mock4js.js");
+const FilePath::CharType kA11yAuditLibraryJSPath[] = FILE_PATH_LITERAL(
+    "third_party/accessibility-developer-tools/gen/axs_testing.js");
 const FilePath::CharType kWebUILibraryJS[] = FILE_PATH_LITERAL("test_api.js");
 const FilePath::CharType kWebUITestFolder[] = FILE_PATH_LITERAL("webui");
 base::LazyInstance<std::vector<std::string> > error_messages_ =
@@ -75,6 +79,13 @@ void WebUIBrowserTest::AddLibrary(const FilePath& library_path) {
   user_libraries_.push_back(library_path);
 }
 
+void WebUIBrowserTest::AddLibraryFromPath(const FilePath path) {
+  FilePath filePath;
+  ASSERT_TRUE(PathService::Get(base::DIR_SOURCE_ROOT, &filePath));
+  filePath = filePath.Append(path);
+  AddLibrary(filePath);
+}
+
 bool WebUIBrowserTest::RunJavascriptFunction(const std::string& function_name) {
   ConstValueVector empty_args;
   return RunJavascriptFunction(function_name, empty_args);
@@ -330,14 +341,9 @@ void WebUIBrowserTest::SetUpInProcessBrowserTestFixture() {
   ResourceBundle::GetSharedInstance().AddDataPackFromPath(
       resources_pack_path, ui::SCALE_FACTOR_NONE);
 
-  FilePath mockPath;
-  ASSERT_TRUE(PathService::Get(base::DIR_SOURCE_ROOT, &mockPath));
-  mockPath = mockPath.AppendASCII("chrome");
-  mockPath = mockPath.AppendASCII("third_party");
-  mockPath = mockPath.AppendASCII("mock4js");
-  mockPath = mockPath.Append(kMockJS);
-  AddLibrary(mockPath);
+  AddLibraryFromPath(FilePath(kMockJSPath));
   AddLibrary(FilePath(kWebUILibraryJS));
+  AddLibraryFromPath(FilePath(kA11yAuditLibraryJSPath));
 }
 
 void WebUIBrowserTest::TearDownInProcessBrowserTestFixture() {