Fix DCHECK() when updating instruments with no phone number.

components/autofill/content/browser/wallet/instrument.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 "components/autofill/content/browser/wallet/instrument.h"
 
 #include "base/logging.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 97 matching lines @@
   dict->SetString("credit_card.fop_type",
                   FormOfPaymentToString(form_of_payment_));
   dict->SetString("credit_card.last_4_digits", last_four_digits_);
   dict->Set("credit_card.address",
             address_.get()->ToDictionaryWithoutID().release());
 
   return dict.Pass();
 }
 
 void Instrument::Init() {
+  expiration_differs_from_server_ = false;

[Evan Stade, 2013/12/07 02:36:12]

you have to put this in all the constructors unfortunately, otherwise I think
coverity will complain.

[Dan Beam, 2013/12/10 22:04:31]

Done.

   if (primary_account_number_.size() >= 4) {
     last_four_digits_ =
         primary_account_number_.substr(primary_account_number_.size() - 4);
   }
 }
 
 }  // namespace wallet
 }  // namespace autofill