Added UMA measurement for how often we see control characters during cookie parsing.

net/cookies/parsed_cookie.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 NET_COOKIES_PARSED_COOKIE_H_
 #define NET_COOKIES_PARSED_COOKIE_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 121 matching lines @@
   // We're really never going to have more than like 8 attributes, so we
   // could fit these into 3 bits each if we're worried about size...
   size_t path_index_;
   size_t domain_index_;
   size_t expires_index_;
   size_t maxage_index_;
   size_t secure_index_;
   size_t httponly_index_;
   size_t priority_index_;
 
+  bool parsed_invalid_control_char_;
+
   DISALLOW_COPY_AND_ASSIGN(ParsedCookie);
 };
 
 }  // namespace net
 
 #endif  // NET_COOKIES_COOKIE_MONSTER_H_