mojo api for view based lockscreen

chrome/browser/ui/ash/lock_screen_client_chromeos.cc

Index: chrome/browser/ui/ash/lock_screen_client_chromeos.cc
diff --git a/chrome/browser/ui/ash/lock_screen_client_chromeos.cc b/chrome/browser/ui/ash/lock_screen_client_chromeos.cc
new file mode 100644
index 0000000000000000000000000000000000000000..705c765e1594a8c6b35c2fbc0be4308d64df7221
--- /dev/null
+++ b/chrome/browser/ui/ash/lock_screen_client_chromeos.cc
@@ -0,0 +1,48 @@
+// Copyright 2017 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 "chrome/browser/ui/ash/lock_screen_client_chromeos.h"
+
+#include "ash/public/interfaces/constants.mojom.h"
+#include "chrome/browser/chromeos/login/lock/screen_locker.h"
+#include "content/public/common/service_manager_connection.h"
+#include "services/service_manager/public/cpp/connector.h"
+
+namespace {
+LockScreenClientChromeOS* g_instance = nullptr;
+}  // namespace
+
+LockScreenClientChromeOS::LockScreenClientChromeOS() : binding_(this) {
+  content::ServiceManagerConnection::GetForProcess()
+      ->GetConnector()
+      ->BindInterface(ash::mojom::kServiceName, &lock_screen_);
+  // Register this object as the client interface implementation.
+  lock_screen_->SetClient(binding_.CreateInterfacePtrAndBind());
+
+  DCHECK(!g_instance);
+  g_instance = this;
+}
+
+LockScreenClientChromeOS::~LockScreenClientChromeOS() {
+  DCHECK_EQ(this, g_instance);
+  g_instance = nullptr;
+}
+
+// static
+LockScreenClientChromeOS* LockScreenClientChromeOS::Get() {
+  return g_instance;
+}
+
+void LockScreenClientChromeOS::AuthenticateUser(const AccountId& account_id,
+                                                const std::string& password,
+                                                bool authenticated_by_pin) {
+  // TODO(xiaoyinh@): Complete the implementation below.
+  // It should be similar as SigninScreenHandler::HandleAuthenticateUser.
+  chromeos::UserContext user_context(account_id);
+  chromeos::ScreenLocker::default_screen_locker()->Authenticate(user_context);
+}
+
+void LockScreenClientChromeOS::ShowErrorMessage() {
+  lock_screen_->ShowErrorMessage();
+}