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>
 
 #include "base/files/file_path.h"
 #include "base/string_piece.h"
 #include "extensions/common/url_pattern.h"
 #include "extensions/common/url_pattern_set.h"
 #include "googleurl/src/gurl.h"
 
 class Pickle;
 class PickleIterator;
 
 namespace extensions {
 
 // 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 |
-                              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);
 
+  // Get the valid user script schemes for the current process. If
+  // canExecuteScriptEverywhere is true, this will return ALL_SCHEMES.
+  static int ValidUserScriptSchemes(bool canExecuteScriptEverywhere = false);
+
   // Locations that user scripts can be run inside the document.
   enum RunLocation {
     UNDEFINED,
     DOCUMENT_START,  // After the documentElemnet is created, but before
                      // anything else happens.
     DOCUMENT_END,  // After the entire document is parsed. Same as
                    // DOMContentLoaded.
     DOCUMENT_IDLE,  // Sometime after DOMContentLoaded, as soon as the document
                     // is "idle". Currently this uses the simple heuristic of:
                     // min(DOM_CONTENT_LOADED + TIMEOUT, ONLOAD), but no
@@ skipping 204 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_