Get chrome:// dev tool urls hooked up in content_shell.

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 48 matching lines @@
 // Special URL used to start a navigation to an error page.
 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();
 
-// Call near the beginning of startup to register the content layer's internal
-// URLs that should be parsed as "standard" with the googleurl library. The
-// embedder can pass a 0-terminated list of additional schemes that should be
-// savable, or NULL if the standard list is sufficient.
-CONTENT_EXPORT void RegisterContentSchemes(
-    const char** additional_savable_schemes);
+// 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_