Move the supervised user error page to a component

components/supervised_user_error_page/supervised_user_error_page.h

+// 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.
+
+#ifndef COMPONENTS_SUPERVISED_USER_ERROR_PAGE_SUPERVISED_USER_ERROR_PAGE_H_
+#define COMPONENTS_SUPERVISED_USER_ERROR_PAGE_SUPERVISED_USER_ERROR_PAGE_H_
+
+#include <string>
+
+#include "base/strings/string16.h"
+
+namespace supervised_user_error_page {
+
+enum FilteringBehaviorReason {
+  DEFAULT,
+  ASYNC_CHECKER,
+  BLACKLIST,
+  MANUAL,
+  WHITELIST
+};
+
+extern int GetBlockMessageID(

[Bernhard Bauer, 2016/03/16 13:59:45]

Why extern? Do you need to export this for a component build? (In which case,
use a macro).

[aberent, 2016/03/16 16:06:41]

I think my C++ just went back 20 years! Some linkers used to create multiple
definitions if functions in header files were not declared extern. Modern C++
forbids this.

I don't think it is needed for component builds; as I have defined the GN file
this is built as part of the browser or WebView, rather than as a separate
library.

Removed.

[Bernhard Bauer, 2016/03/16 17:12:27]

Yes, these days only constants get internal linkage by default.

+    supervised_user_error_page::FilteringBehaviorReason reason,
+    bool is_child_account,
+    bool single_parent);
+
+extern std::string BuildHtml(bool allow_access_requests,
+                             const std::string& profile_image_url,
+                             const std::string& profile_image_url2,
+                             const base::string16& custodian,
+                             const base::string16& custodian_email,
+                             const base::string16& second_custodian,
+                             const base::string16& second_custodian_email,
+                             bool is_child_account,
+                             FilteringBehaviorReason reason,
+                             const std::string& app_locale);
+
+}  //  namespace supervised_user_error_page
+
+#endif /* COMPONENTS_SUPERVISED_USER_ERROR_PAGE_SUPERVISED_USER_ERROR_PAGE_H_ \
+          */