Revert 239759 "The comment in base64.h implies that base::Base64..."

trunk/src/chrome/browser/ui/autofill/autofill_dialog_controller_impl.cc

 // 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.
 
 #include "chrome/browser/ui/autofill/autofill_dialog_controller_impl.h"
 
 #include <algorithm>
 #include <map>
 #include <string>
 
@@ skipping 2593 matching lines @@
       base::Bind(&AutofillDialogControllerImpl::OnDidLoadRiskFingerprintData,
                  weak_ptr_factory_.GetWeakPtr()));
 }
 
 void AutofillDialogControllerImpl::OnDidLoadRiskFingerprintData(
     scoped_ptr<risk::Fingerprint> fingerprint) {
   DCHECK(AreLegalDocumentsCurrent());
 
   std::string proto_data;
   fingerprint->SerializeToString(&proto_data);
-  base::Base64Encode(proto_data, &risk_data_);
+  bool success = base::Base64Encode(proto_data, &risk_data_);
+  DCHECK(success);
 
   SubmitWithWallet();
 }
 
 void AutofillDialogControllerImpl::OpenTabWithUrl(const GURL& url) {
   chrome::NavigateParams params(
       chrome::FindBrowserWithWebContents(web_contents()),
       url,
       content::PAGE_TRANSITION_LINK);
   params.disposition = NEW_FOREGROUND_TAB;
@@ skipping 913 matching lines @@
   view_->UpdateButtonStrip();
 }
 
 void AutofillDialogControllerImpl::FetchWalletCookie() {
   net::URLRequestContextGetter* request_context = profile_->GetRequestContext();
   signin_helper_.reset(new wallet::WalletSigninHelper(this, request_context));
   signin_helper_->StartWalletCookieValueFetch();
 }
 
 }  // namespace autofill