Restricting redirects to chrome:

content/browser/child_process_security_policy.h

 // Copyright (c) 2011 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_BROWSER_CHILD_PROCESS_SECURITY_POLICY_H_
 #define CONTENT_BROWSER_CHILD_PROCESS_SECURITY_POLICY_H_
 
 #pragma once
 
 #include <map>
@@ skipping 28 matching lines @@
   static ChildProcessSecurityPolicy* GetInstance();
 
   // Web-safe schemes can be requested by any child process.  Once a web-safe
   // scheme has been registered, any child process can request URLs with
   // that scheme.  There is no mechanism for revoking web-safe schemes.
   void RegisterWebSafeScheme(const std::string& scheme);
 
   // Returns true iff |scheme| has been registered as a web-safe scheme.
   bool IsWebSafeScheme(const std::string& scheme);
 
+  // WebUI schemes are any to which access should be restricted to child
+  // processes that have been granted WebUIBindings. There is no mechanism for
+  // revoking WebUI schemes.
+  void RegisterWebUIScheme(const std::string& scheme);
+
+  // Returns true iff |scheme| has been registered as a WebUI scheme
+  bool IsWebUIScheme(const std::string& scheme);
+
   // Pseudo schemes are treated differently than other schemes because they
   // cannot be requested like normal URLs.  There is no mechanism for revoking
   // pseudo schemes.
   void RegisterPseudoScheme(const std::string& scheme);
 
   // Returns true iff |scheme| has been registered as pseudo scheme.
   bool IsPseudoScheme(const std::string& scheme);
 
   // Sets the list of disabled schemes.
   // URLs using these schemes won't be loaded at all. The previous list of
@@ skipping 55 matching lines @@
   void GrantReadRawCookies(int child_id);
 
   // Revoke read raw cookies permission.
   void RevokeReadRawCookies(int child_id);
 
   // Before servicing a child process's request for a URL, the browser should
   // call this method to determine whether the process has the capability to
   // request the URL.
   bool CanRequestURL(int child_id, const GURL& url);
 
+  // Before servicing a child process's request to redirect to a URL, the
+  // browser should call this method to determine whether the process has the
+  // capability to redirect to it. This is slightly more restrictive than
+  // CanRequestURL.
+  bool CanRedirectURL(int child_id, const GURL& url);

[abarth-chromium, 2011/09/19 06:46:39]

I'm not sure I understand why CanRedirectURL is any different than
CanRequestURL.

+
   // Before servicing a child process's request to upload a file to the web, the
   // browser should call this method to determine whether the process has the
   // capability to upload the requested file.
   bool CanReadFile(int child_id, const FilePath& file);
 
   // Before servicing a child process's request to enumerate a directory
   // the browser should call this method to check for the capability.
   bool CanReadDirectory(int child_id, const FilePath& directory);
 
   // Determines if certain permissions were granted for a file. |permissions|
@@ skipping 40 matching lines @@
                                          int permissions);
 
   // You must acquire this lock before reading or writing any members of this
   // class.  You must not block while holding this lock.
   base::Lock lock_;
 
   // These schemes are white-listed for all child processes.  This set is
   // protected by |lock_|.
   SchemeSet web_safe_schemes_;
 
+  // These schemes are only accessible by children with WebUI bindings.  This
+  // set is protected by |lock_|.
+  SchemeSet webui_schemes_;
+
   // These schemes do not actually represent retrievable URLs.  For example,
   // the the URLs in the "about" scheme are aliases to other URLs.  This set is
   // protected by |lock_|.
   SchemeSet pseudo_schemes_;
 
   // These schemes are disabled by policy, and child processes are always
   // denied permission to request them. This overrides |web_safe_schemes_|.
   // This set is protected by |lock_|.
   SchemeSet disabled_schemes_;
 
   // This map holds a SecurityState for each child process.  The key for the
   // map is the ID of the ChildProcessHost.  The SecurityState objects are
   // owned by this object and are protected by |lock_|.  References to them must
   // not escape this class.
   SecurityStateMap security_state_;
 
   // This maps keeps the record of which js worker thread child process
   // corresponds to which main js thread child process.
   WorkerToMainProcessMap worker_map_;
 
   DISALLOW_COPY_AND_ASSIGN(ChildProcessSecurityPolicy);
 };
 
 #endif  // CONTENT_BROWSER_CHILD_PROCESS_SECURITY_POLICY_H_