Handle server profile/card disappearing while launching editor.

chrome/android/java/src/org/chromium/chrome/browser/preferences/autofill/AutofillServerCardPreferences.java

 // Copyright 2015 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.
 
 package org.chromium.chrome.browser.preferences.autofill;
 
 import android.os.Bundle;
 import android.preference.Preference;
 import android.preference.Preference.OnPreferenceClickListener;
 import android.preference.PreferenceFragment;
@@ skipping 22 matching lines @@
         getActivity().setTitle(R.string.autofill_edit_credit_card);
 
         // We know which card to display based on the GUID stuffed in
         // our extras by AutofillPreferences.
         Bundle extras = getArguments();
         if (extras != null) {
             mGUID = extras.getString(AutofillPreferences.AUTOFILL_GUID);
         }
         assert mGUID != null;
         CreditCard card = PersonalDataManager.getInstance().getCreditCard(mGUID);
+        if (card == null) {
+            getActivity().finish();
+            return;
+        }
+
         assert !card.getIsLocal();
 
         Preference cardDescription = findPreference(PREF_SERVER_CARD_DESCRIPTION);
         cardDescription.setTitle(card.getObfuscatedNumber());
         cardDescription.setSummary(card.getFormattedExpirationDate(getActivity()));
 
         findPreference(PREF_SERVER_CARD_EDIT_LINK).setOnPreferenceClickListener(this);
 
         Preference clearLocalCopy = findPreference(PREF_SERVER_CARD_LOCAL_COPY);
         if (!card.getIsCached()) {
             getPreferenceScreen().removePreference(clearLocalCopy);
         } else {
             clearLocalCopy.setOnPreferenceClickListener(this);
         }
     }
 
     @Override
     public boolean onPreferenceClick(Preference preference) {
         if (preference.getKey().equals(PREF_SERVER_CARD_EDIT_LINK)) {
             EmbedContentViewActivity.show(preference.getContext(),
                     R.string.autofill_edit_credit_card, R.string.autofill_manage_wallet_cards_url);
         } else {
             assert preference.getKey().equals(PREF_SERVER_CARD_LOCAL_COPY);
             PersonalDataManager.getInstance().clearUnmaskedCache(mGUID);

[newt (away), 2015/11/30 21:43:57]

What happens on this line if mGUID no longer represents a valid card?

[please use gerrit instead, 2015/11/30 22:38:49]

The invalid GUID is skipped over:

https://code.google.com/p/chromium/codesearch#chromium/src/components/autofil...

             // It's no longer cached locally. Hide the clear button.
             getPreferenceScreen().removePreference(preference);
         }
         return true;
     }
 }