[sync] Auto-create credential cache for users who are already signed in and go on to upgrade Chrome

chrome/browser/sync/credential_cache_service_win_unittest.cc

 // Copyright (c) 2012 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 <string>
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop.h"
 #include "base/scoped_temp_dir.h"
@@ skipping 21 matching lines @@
     set_local_store(new JsonPrefStore(
         temp_dir_.path().Append(chrome::kSyncCredentialsFilename),
         file_message_loop_.message_loop_proxy()));
   }
 
   // testing::Test implementation.
   virtual void TearDown() OVERRIDE {
     file_message_loop_.RunAllPending();
   }
 
-  // PrefStore::Observer implementation.
-  virtual void OnInitializationCompleted(bool succeeded) OVERRIDE {}
-
  private:
   ScopedTempDir temp_dir_;
   MessageLoop file_message_loop_;
   DISALLOW_COPY_AND_ASSIGN(CredentialCacheServiceTest);
 };
 
 TEST_F(CredentialCacheServiceTest, TestPackAndUnpack) {
   // Pack a sample credential string.
   std::string original = "sample_credential";
   scoped_ptr<base::StringValue> packed(
@@ skipping 72 matching lines @@
 
   // Try to write a boolean pref with value true, and make sure an the default
   // value of false is written in its place.
   UpdateBooleanPref(prefs::kSyncKeepEverythingSynced, sync_everything);
   ASSERT_TRUE(HasPref(local_store(), prefs::kSyncKeepEverythingSynced));
   ASSERT_TRUE(false == GetBooleanPref(local_store(),
                                       prefs::kSyncKeepEverythingSynced));
 }
 
 }  // namespace syncer