Only UTF-8 sync tags for Wallet metadata.

components/autofill/core/browser/autofill_profile.h

 // Copyright 2013 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 COMPONENTS_AUTOFILL_CORE_BROWSER_AUTOFILL_PROFILE_H_
 #define COMPONENTS_AUTOFILL_CORE_BROWSER_AUTOFILL_PROFILE_H_
 
 #include <stddef.h>
 
 #include <iosfwd>
@@ skipping 142 matching lines @@
       ServerFieldType excluded_field,
       size_t minimal_fields_shown,
       const std::string& app_locale,
       std::vector<base::string16>* labels);
 
   const std::string& language_code() const { return language_code_; }
   void set_language_code(const std::string& language_code) {
     language_code_ = language_code;
   }
 
-  // Nonempty only when type() == SERVER_PROFILE.
+  // Nonempty only when type() == SERVER_PROFILE. base::kSHA1Length bytes long.
+  // Not valid UTF-8.

[Ilya Sherman, 2015/07/06 23:39:00]

nit: "Not valid" -> "Not necessarily valid"

   const std::string& server_id() const { return server_id_; }
 
   // Creates an identifier and saves it as |server_id_|. Only used for
   // server credit cards. The server doesn't attach an identifier so Chrome
   // creates its own. The ID is a hash of the data contained in the profile.
   void GenerateServerProfileIdentifier();
 
   // Returns a standardized representation of the given string for comparison
   // purposes. The resulting string will be lower-cased with all punctuation
   // substituted by spaces. Whitespace will be converted to ASCII space, and
@@ skipping 65 matching lines @@
   // a hash of the contents.
   std::string server_id_;
 };
 
 // So we can compare AutofillProfiles with EXPECT_EQ().
 std::ostream& operator<<(std::ostream& os, const AutofillProfile& profile);
 
 }  // namespace autofill
 
 #endif  // COMPONENTS_AUTOFILL_CORE_BROWSER_AUTOFILL_PROFILE_H_