non-new-profile-management creates a "no-op" style account_reconcilor,

components/signin/core/browser/test_signin_client.cc

 // Copyright 2014 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 "base/logging.h"
 #include "components/signin/core/browser/test_signin_client.h"
 #include "components/signin/core/browser/webdata/token_service_table.h"
 #include "components/webdata/common/web_data_service_base.h"
 #include "components/webdata/common/web_database_service.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 #if defined(OS_IOS)
 #include "ios/public/test/fake_profile_oauth2_token_service_ios_provider.h"
 #endif
 
 namespace {
 
 // Helper for testing.
 const int kInvalidProcessId = -1;
 }
 
 TestSigninClient::TestSigninClient()
     : request_context_(new net::TestURLRequestContextGetter(
-          base::MessageLoopProxy::current())) {
+          base::MessageLoopProxy::current())),
+      pref_service_(NULL) {
   LoadDatabase();
 }
 
+TestSigninClient::TestSigninClient(PrefService* pref_service)
+    : pref_service_(pref_service) {}
+
 TestSigninClient::~TestSigninClient() {}
 
-PrefService* TestSigninClient::GetPrefs() { return NULL; }
+PrefService* TestSigninClient::GetPrefs() {
+  return pref_service_;
+}
 
 scoped_refptr<TokenWebData> TestSigninClient::GetDatabase() {
   return database_;
 }
 
 bool TestSigninClient::CanRevokeCredentials() { return true; }
 
 net::URLRequestContextGetter* TestSigninClient::GetURLRequestContext() {
   return request_context_;
 }
@@ skipping 49 matching lines @@
   signin_host_id_ = kInvalidProcessId;
 }
 
 bool TestSigninClient::IsSigninProcess(int process_id) const {
   return process_id == signin_host_id_;
 }
 
 bool TestSigninClient::HasSigninProcess() const {
   return signin_host_id_ != kInvalidProcessId;
 }