Store the language code for the address in autofill profile.

chrome/browser/ui/autofill/autofill_dialog_i18n_input.h

 // Copyright 2014 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_BROWSER_UI_AUTOFILL_AUTOFILL_DIALOG_I18N_INPUT_H_
 #define CHROME_BROWSER_UI_AUTOFILL_AUTOFILL_DIALOG_I18N_INPUT_H_
 
 #include <string>
 
 #include "base/callback.h"
 #include "base/strings/string16.h"
 #include "chrome/browser/ui/autofill/autofill_dialog_common.h"
 #include "chrome/browser/ui/autofill/autofill_dialog_types.h"
 #include "components/autofill/core/browser/autofill_type.h"
 #include "third_party/libaddressinput/chromium/cpp/include/libaddressinput/address_field.h"
 
 namespace i18n {
 namespace addressinput {
 struct AddressData;
 }
 }
 
 namespace autofill {
 
 class AutofillProfile;
 class CreditCard;
 
 namespace i18ninput {
 
-// Builds internationalized address input fields for |country_code| and adds
-// them (at most 13) to |inputs|. |address_type| is which kind of address to
-// build (e.g. billing or shipping).
+// Builds internationalized address input fields for |address_type| (e.g.
+// billing or shipping) in |country_code| (e.g. "US" or "CH").
+//
+// Adds the fields (at most 13) to |inputs|. The |inputs| parameter should not
+// be NULL.
+//
+// Sets the |language_code| to be used for address formatting. The
+// |language_code| parameter can be NULL.
 void BuildAddressInputs(common::AddressType address_type,
                         const std::string& country_code,
-                        DetailInputs* inputs);
+                        DetailInputs* inputs,
+                        std::string* language_code);

[Evan Stade, 2014/04/10 00:58:49]

it's unclear to me from your above comment whether this is supposed to be an
outparam or inparam

[please use gerrit instead, 2014/04/10 20:39:45]

It's an out-param. I've changed the comment to clarify this point.

 
 // Returns whether the given card is complete and verified (i.e. was reviewed
 // by the user and not just automatically aggregated).
 bool CardHasCompleteAndVerifiedData(const CreditCard& card);
 
 // As above, but for the address in |profile|. Region-aware, meaning that the
 // exact set of required fields depends on the region.
 bool AddressHasCompleteAndVerifiedData(const AutofillProfile& profile);
 
 // Returns the corresponding Autofill server type for |field|.
@@ skipping 14 matching lines @@
 
 // Whether or not |country_code| has a fully supported address format.
 // TODO(dbeam): remove this when filling dependent locality is supported.
 // http://crbug.com/340929
 bool CountryIsFullySupported(const std::string& country_code);
 
 }  // namespace i18ninput
 }  // namespace autofill
 
 #endif  // CHROME_BROWSER_UI_AUTOFILL_AUTOFILL_DIALOG_I18N_INPUT_H_