Don't allow null bytes in hosts of host permissions.

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 <iosfwd>
 #include <string>
 #include <vector>
@@ skipping 55 matching lines @@
   // Error codes returned from Parse().
   enum ParseResult {
     PARSE_SUCCESS = 0,
     PARSE_ERROR_MISSING_SCHEME_SEPARATOR,
     PARSE_ERROR_INVALID_SCHEME,
     PARSE_ERROR_WRONG_SCHEME_SEPARATOR,
     PARSE_ERROR_EMPTY_HOST,
     PARSE_ERROR_INVALID_HOST_WILDCARD,
     PARSE_ERROR_EMPTY_PATH,
     PARSE_ERROR_INVALID_PORT,
+    PARSE_ERROR_INVALID_HOST,
     NUM_PARSE_RESULTS
   };
 
   // The <all_urls> string pattern.
   static const char kAllUrlsPattern[];
 
   // Returns true if the given |scheme| is considered valid for extensions.
   static bool IsValidSchemeForExtensions(const std::string& scheme);
 
   explicit URLPattern(int valid_schemes);
@@ skipping 161 matching lines @@
 
   // A string representing this URLPattern.
   mutable std::string spec_;
 };
 
 std::ostream& operator<<(std::ostream& out, const URLPattern& url_pattern);
 
 typedef std::vector<URLPattern> URLPatternList;
 
 #endif  // EXTENSIONS_COMMON_URL_PATTERN_H_