Creating a preference for storing a sync password hash.

chrome/browser/password_manager/password_store_proxy_mac.h

 // 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.
 
 #ifndef CHROME_BROWSER_PASSWORD_MANAGER_PASSWORD_STORE_PROXY_MAC_H_
 #define CHROME_BROWSER_PASSWORD_MANAGER_PASSWORD_STORE_PROXY_MAC_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 19 matching lines @@
 // SimplePasswordStoreMac and instantiating a correct backend according to the
 // user's state.
 class PasswordStoreProxyMac : public password_manager::PasswordStore {
  public:
   PasswordStoreProxyMac(
       scoped_refptr<base::SingleThreadTaskRunner> main_thread_runner,
       std::unique_ptr<crypto::AppleKeychain> keychain,
       std::unique_ptr<password_manager::LoginDatabase> login_db,
       PrefService* prefs);
 
-  bool Init(const syncer::SyncableService::StartSyncFlare& flare) override;
+  bool Init(const syncer::SyncableService::StartSyncFlare& flare,
+            PrefService* prefs) override;
   void ShutdownOnUIThread() override;
   scoped_refptr<base::SingleThreadTaskRunner> GetBackgroundTaskRunner()
       override;
 
 #if defined(UNIT_TEST)
   password_manager::LoginDatabase* login_metadata_db() {
     return login_metadata_db_.get();
   }
 
   crypto::AppleKeychain* keychain() {
@@ skipping 75 matching lines @@
   // them. If this is the case then Shutdown() flushes the tasks after stopping
   // the background thread.
   // After InitOnBackgroundThread is run once, the queue may not be modified on
   // the background thread any more.
   std::vector<base::Closure> pending_ui_tasks_;
 
   DISALLOW_COPY_AND_ASSIGN(PasswordStoreProxyMac);
 };
 
 #endif  // CHROME_BROWSER_PASSWORD_MANAGER_PASSWORD_STORE_PROXY_MAC_H_