Implement i18n::addressinput::Downloader for requestAutocomplete() (and

chrome/browser/ui/autofill/autofill_dialog_controller_impl.h

Index: chrome/browser/ui/autofill/autofill_dialog_controller_impl.h
diff --git a/chrome/browser/ui/autofill/autofill_dialog_controller_impl.h b/chrome/browser/ui/autofill/autofill_dialog_controller_impl.h
index 70377c0ee6626524f011ef96e1954950d15b5801..f97188c1cabd2060f5c305411f5ee6c2f976a273 100644
--- a/chrome/browser/ui/autofill/autofill_dialog_controller_impl.h
+++ b/chrome/browser/ui/autofill/autofill_dialog_controller_impl.h
@@ -31,6 +31,7 @@
 #include "components/autofill/core/browser/form_structure.h"
 #include "components/autofill/core/browser/personal_data_manager.h"
 #include "components/autofill/core/browser/personal_data_manager_observer.h"
+#include "components/autofill/core/browser/validation_downloader.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "content/public/browser/web_contents_observer.h"
@@ -603,6 +604,10 @@ class AutofillDialogControllerImpl : public AutofillDialogViewDelegate,
   // A client to talk to the Online Wallet API.
   wallet::WalletClient wallet_client_;
 
+  // Downloads validation rules for address input. New rules are downloaded when
+  // country is changed.
+  ValidationDownloader validation_downloader_;
+
   // True if |this| has ever called GetWalletItems().
   bool wallet_items_requested_;