Add a browser test for access control for file: scheme

chrome/browser/net/errorpage_test_util.h

Index: chrome/browser/net/errorpage_test_util.h
diff --git a/chrome/browser/net/errorpage_test_util.h b/chrome/browser/net/errorpage_test_util.h
new file mode 100644
index 0000000000000000000000000000000000000000..e917210e4407fbfdec3e8910894d0b73af47951a
--- /dev/null
+++ b/chrome/browser/net/errorpage_test_util.h
@@ -0,0 +1,23 @@
+// Copyright (c) 2017 The Chromium Authors. All rights reserved.

[mmenke, 2017/06/05 18:31:34]

nit:  -(c)

[satorux1, 2017/06/06 08:52:37]

done - but this file is gone.

+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROME_BROWSER_NET_ERRORPAGE_TEST_UTIL_H_
+#define CHROME_BROWSER_NET_ERRORPAGE_TEST_UTIL_H_
+
+#include <string>
+
+#include "base/compiler_specific.h"
+#include "chrome/browser/ui/browser.h"
+
+namespace errorpage_test_util {
+
+// Returns true if |text| is displayed on the page |browser| is currently
+// displaying. Uses "innerText", so will miss hidden text, and whitespace
+// space handling may be weird.

[mmenke, 2017/06/05 18:31:34]

It actually doesn't use "innerText" (Know you just copied this).

Maybe something like "Searches for first node containing |text|, and if it finds
one, searches through all ancestors seeing if any of them is of class "hidden".
Since it relies on the hidden class used by network error pages, not suitable
for general use."

[satorux1, 2017/06/06 08:52:37]

Updated the comment in errorpage_browsertest.cc :)

+bool WARN_UNUSED_RESULT IsDisplayingText(Browser* browser,
+                                         const std::string& text);
+
+}  // errorpage_test_util
+
+#endif  // CHROME_BROWSER_NET_ERRORPAGE_TEST_UTIL_H_