Allow content script insertion on about:-URLs.

extensions/common/url_pattern.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 EXTENSIONS_COMMON_URL_PATTERN_H_
 #define EXTENSIONS_COMMON_URL_PATTERN_H_
 
 #include <functional>
 #include <string>
 #include <vector>
 
 class GURL;
 
 // A pattern that can be used to match URLs. A URLPattern is a very restricted
 // subset of URL syntax:
 //
 // <url-pattern> := <scheme>://<host><port><path> | '<all_urls>'
 // <scheme> := '*' | 'http' | 'https' | 'file' | 'ftp' | 'chrome' |
-//             'chrome-extension' | 'filesystem'
+//             'chrome-extension' | 'filesystem' | 'about'
 // <host> := '*' | '*.' <anychar except '/' and '*'>+
 // <port> := [':' ('*' | <port number between 0 and 65535>)]
 // <path> := '/' <any chars>
 //
 // * Host is not used when the scheme is 'file'.
 // * The path can have embedded '*' characters which act as glob wildcards.
 // * '<all_urls>' is a special pattern that matches any URL that contains a
 //   valid scheme (as specified by valid_schemes_).
 // * The '*' scheme pattern excludes file URLs.
 //
@@ skipping 16 matching lines @@
   // A collection of scheme bitmasks for use with valid_schemes.
   enum SchemeMasks {
     SCHEME_NONE       = 0,
     SCHEME_HTTP       = 1 << 0,
     SCHEME_HTTPS      = 1 << 1,
     SCHEME_FILE       = 1 << 2,
     SCHEME_FTP        = 1 << 3,
     SCHEME_CHROMEUI   = 1 << 4,
     SCHEME_EXTENSION  = 1 << 5,
     SCHEME_FILESYSTEM = 1 << 6,
+    SCHEME_ABOUT      = 1 << 7,
 
     // IMPORTANT!
     // SCHEME_ALL will match every scheme, including chrome://, chrome-
     // extension://, about:, etc. Because this has lots of security
     // implications, third-party extensions should usually not be able to get
     // access to URL patterns initialized this way. If there is a reason
     // for violating this general rule, document why this it safe.
     SCHEME_ALL      = -1,
   };
 
@@ skipping 172 matching lines @@
   // MatchPattern() function.
   std::string path_escaped_;
 
   // A string representing this URLPattern.
   mutable std::string spec_;
 };
 
 typedef std::vector<URLPattern> URLPatternList;
 
 #endif  // EXTENSIONS_COMMON_URL_PATTERN_H_