Allow extensions on chrome:// URLs, when flag is set and permission is explicitly requested

chrome/common/extensions/user_script.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 CHROME_COMMON_EXTENSIONS_USER_SCRIPT_H_
 #define CHROME_COMMON_EXTENSIONS_USER_SCRIPT_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 10 matching lines @@
 
 // Represents a user script, either a standalone one, or one that is part of an
 // extension.
 class UserScript {
  public:
   // The file extension for standalone user scripts.
   static const char kFileExtension[];
 
   // The bitmask for valid user script injectable schemes used by URLPattern.
   enum {
-    kValidUserScriptSchemes = URLPattern::SCHEME_HTTP |
+    kValidUserScriptSchemes = URLPattern::SCHEME_CHROMEUI |
+                              URLPattern::SCHEME_HTTP |
                               URLPattern::SCHEME_HTTPS |
                               URLPattern::SCHEME_FILE |
                               URLPattern::SCHEME_FTP
   };
 
   // Check if a URL should be treated as a user script and converted to an
   // extension.
   static bool IsURLUserScript(const GURL& url, const std::string& mime_type);
 
   // Locations that user scripts can be run inside the document.
@@ skipping 213 matching lines @@
 
   // True if the script should be injected into an incognito tab.
   bool incognito_enabled_;
 };
 
 typedef std::vector<UserScript> UserScriptList;
 
 }  // namespace extensions
 
 #endif  // CHROME_COMMON_EXTENSIONS_USER_SCRIPT_H_