Implement PasswordStoreProxyMac and SimplePasswordStoreMac.

chrome/browser/password_manager/simple_password_store_mac.h

Index: chrome/browser/password_manager/simple_password_store_mac.h
diff --git a/chrome/browser/password_manager/simple_password_store_mac.h b/chrome/browser/password_manager/simple_password_store_mac.h
new file mode 100644
index 0000000000000000000000000000000000000000..e7ad4d91e86a388ae99730f6cef4aebfcf60397e
--- /dev/null
+++ b/chrome/browser/password_manager/simple_password_store_mac.h
@@ -0,0 +1,38 @@
+// 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_SIMPLE_PASSWORD_STORE_MAC_H_
+#define CHROME_BROWSER_PASSWORD_MANAGER_SIMPLE_PASSWORD_STORE_MAC_H_
+
+#include "components/password_manager/core/browser/password_store_default.h"
+
+// The same as PasswordStoreDefault but running on the dedicated thread. The
+// owner is responsible for the thread lifetime.
+class SimplePasswordStoreMac : public password_manager::PasswordStoreDefault {
+ public:
+  SimplePasswordStoreMac(
+      scoped_refptr<base::SingleThreadTaskRunner> main_thread_runner,
+      scoped_refptr<base::SingleThreadTaskRunner> background_thread_runner,
+      scoped_ptr<password_manager::LoginDatabase> login_db);
+
+  // Just hides the parent method. All the initialization is to be done by the
+  // proxy.
+  bool Init(const syncer::SyncableService::StartSyncFlare& flare) override;
+
+  // Clean |background_thread_runner_|.
+  void Shutdown() override;
+
+  scoped_refptr<base::SingleThreadTaskRunner> GetBackgroundTaskRunner()
+      override;
+
+ protected:
+  ~SimplePasswordStoreMac() override;
+
+ private:
+  scoped_refptr<base::SingleThreadTaskRunner> background_thread_runner_;
+
+  DISALLOW_COPY_AND_ASSIGN(SimplePasswordStoreMac);
+};
+
+#endif  // CHROME_BROWSER_PASSWORD_MANAGER_SIMPLE_PASSWORD_STORE_MAC_H_