Refactor sync passphrase setup flow and fix passphrase tests

chrome/browser/resources/sync_internals/chrome_sync.js

 // Copyright (c) 2011 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.
 
 var chrome = chrome || {};
 // TODO(akalin): Add mocking code for e.g. chrome.send() so that we
 // can test this without rebuilding chrome.
 chrome.sync = chrome.sync || {};
 (function () {
 
@@ skipping 162 matching lines @@
 }
 
 function onAuthError(authError) {
   chrome.sync.onAuthError.dispatch_(authError);
 }
 
 function onUpdatedToken(token) {
   chrome.sync.onUpdatedToken.dispatch_(token);
 }
 
-function onPassphraseRequired(forDecryption) {
-  chrome.sync.onPassphraseRequired.dispatch_(forDecryption);
+function onPassphraseRequired(reason) {
+  chrome.sync.onPassphraseRequired.dispatch_(reason);
 }
 
 function onPassphraseAccepted(bootstrapToken) {
   chrome.sync.onPassphraseAccepted.dispatch_(bootstrapToken);
 }
 
 function onEncryptionComplete(encrypted_types) {
   chrome.sync.onEncryptionComplete.dispatch_(encrypted_types);
 }
 
@@ skipping 39 matching lines @@
   chrome.sync.getRootNode_.handleReply(rootNode);
 }
 
 function onGetNodeByIdFinished(node) {
   chrome.sync.getNodeById_.handleReply(node);
 }
 
 function onGetNotificationInfoFinished(notificationInfo) {
   chrome.sync.getNotificationInfo_.handleReply(notificationInfo);
 }