MD Settings: validate startup URLs

chrome/browser/ui/webui/settings_utils.cc

Index: chrome/browser/ui/webui/settings_utils.cc
diff --git a/chrome/browser/ui/webui/settings_utils.cc b/chrome/browser/ui/webui/settings_utils.cc
new file mode 100644
index 0000000000000000000000000000000000000000..2e3200d8080b09ed9567087ed527a50524b8353d
--- /dev/null
+++ b/chrome/browser/ui/webui/settings_utils.cc
@@ -0,0 +1,22 @@
+// Copyright 2016 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/settings_utils.h"
+
+#include "chrome/browser/extensions/extension_tab_util.h"
+#include "components/url_formatter/url_fixer.h"
+#include "url/gurl.h"
+
+namespace settings_utils {
+
+bool FixupAndValidateStartupPage(const std::string& url_string,
+                                 GURL* url_fixed) {
+  GURL url = url_formatter::FixupURL(url_string, std::string());
+  bool valid = url.is_valid() && !extensions::ExtensionTabUtil::IsKillURL(url);
+  if (valid && url_fixed)
+    url_fixed->Swap(&url);
+  return valid;
+}
+
+}  // namespace settings_utils