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

content/public/common/content_client.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_CONTENT_CLIENT_H_
 #define CONTENT_PUBLIC_COMMON_CONTENT_CLIENT_H_
 #pragma once
 
 #include <string>
 #include <vector>
@@ skipping 76 matching lines @@
   virtual void SetGpuInfo(const content::GPUInfo& gpu_info) = 0;
 
   // Gives the embedder a chance to register its own pepper plugins.
   virtual void AddPepperPlugins(
       std::vector<content::PepperPluginInfo>* plugins) = 0;
 
   // Gives the embedder a chance to register its own internal NPAPI plugins.
   virtual void AddNPAPIPlugins(
       webkit::npapi::PluginList* plugin_list) = 0;
 
+  // Gives the embedder a chance to register its own standard and saveable
+  // url schemes early on in the startup sequence.
+  virtual void AddAdditionalSchemes(
+      std::vector<std::string>* standard_schemes,
+      std::vector<std::string>* savable_schemes) = 0;
+
   // Returns true if the url has a scheme for WebUI.  See also
   // WebUIControllerFactory::UseWebUIForURL in the browser process.
   virtual bool HasWebUIScheme(const GURL& url) const = 0;
 
   // Returns whether the given message should be processed in the browser on
   // behalf of a swapped out renderer.
   virtual bool CanHandleWhileSwappedOut(const IPC::Message& msg) = 0;
 
   // Returns the user agent.
   virtual std::string GetUserAgent() const = 0;
@@ skipping 30 matching lines @@
   ContentPluginClient* plugin_;
   // The embedder API for participating in renderer logic.
   ContentRendererClient* renderer_;
   // The embedder API for participating in utility logic.
   ContentUtilityClient* utility_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_COMMON_CONTENT_CLIENT_H_