Whitelist unreachable webdata pages for content settings

content/public/common/url_constants.h

 // 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.
 
 #ifndef CONTENT_PUBLIC_COMMON_URL_CONSTANTS_H_
 #define CONTENT_PUBLIC_COMMON_URL_CONSTANTS_H_
 #pragma once
 
 #include "content/common/content_export.h"
 
@@ skipping 42 matching lines @@
 CONTENT_EXPORT extern const char kChromeUIShorthangURL[];
 
 }  // namespace chrome
 
 namespace content {
 
 // Used to separate a standard scheme and the hostname: "://".
 CONTENT_EXPORT extern const char kStandardSchemeSeparator[];
 
 // Special URL used to start a navigation to an error page.
-extern const char kUnreachableWebDataURL[];
+CONTENT_EXPORT extern const char kUnreachableWebDataURL[];
 
 // Special URL used to swap out a view being rendered by another process.
 extern const char kSwappedOutURL[];
 
 // Null terminated list of schemes that are savable. This function can be
 // invoked on any thread.
 CONTENT_EXPORT const char** GetSavableSchemes();
 
 // Note: ContentMainRunner calls this method internally as part of main
 // initialziation, so this function generally should not be called by
 // embedders. It's exported to facilitate test harnesses that do not
 // utilize ContentMainRunner and that do not wish to lock the set
 // of standard schemes at init time.
 //
 // Called near the beginning of startup to register URL schemes that should
 // be parsed as "standard" with the googleurl library. Optionally, the set
 // of standard schemes is locked down. The embedder can add additional
 // schemes by overriding the ContentClient::AddAdditionalSchemes method.
 CONTENT_EXPORT void RegisterContentSchemes(bool lock_standard_schemes);
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_COMMON_URL_CONSTANTS_H_