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

components/autofill/content/browser/wallet/instrument.h

Index: components/autofill/content/browser/wallet/instrument.h
diff --git a/components/autofill/content/browser/wallet/instrument.h b/components/autofill/content/browser/wallet/instrument.h
index b706a7e340dbc460c5adf5b316ea6b4b038895a0..c9b7ecd0cd3c8ae49d32f35879c665cba043a46c 100644
--- a/components/autofill/content/browser/wallet/instrument.h
+++ b/components/autofill/content/browser/wallet/instrument.h
@@ -6,6 +6,7 @@
 #define COMPONENTS_AUTOFILL_CONTENT_BROWSER_WALLET_INSTRUMENT_H_
 
 #include <string>
+
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/strings/string16.h"
@@ -67,7 +68,13 @@ class Instrument {
   FormOfPayment form_of_payment() const { return form_of_payment_; }
   const base::string16& last_four_digits() const { return last_four_digits_; }
   const std::string& object_id() const { return object_id_; }
+  bool expiration_differs_from_server() const {
+    return expiration_differs_from_server_;
+  }
   void set_object_id(const std::string& object_id) { object_id_ = object_id; }
+  void set_expiration_differs_from_server(bool expiration_differs_from_server) {
+    expiration_differs_from_server_ = expiration_differs_from_server;
+  }
 
  private:
   void Init();
@@ -96,6 +103,10 @@ class Instrument {
   // Externalized Online Wallet id for this instrument.
   std::string object_id_;
 
+  // Whether the expiration date differs from the server version of this
+  // instrument.
+  bool expiration_differs_from_server_;
+
   DISALLOW_ASSIGN(Instrument);
 };