Add simplistic screenlock application.

mash/shell/shell_application_delegate.cc

 // 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.
 
 #include "mash/shell/shell_application_delegate.h"
 
 #include "base/bind.h"
+#include "mash/screenlock/public/interfaces/screenlock.mojom.h"
 #include "mojo/shell/public/cpp/application_connection.h"
 #include "mojo/shell/public/cpp/application_impl.h"
 
 namespace mash {
 namespace shell {
 
 ShellApplicationDelegate::ShellApplicationDelegate() : app_(nullptr) {}
 
 ShellApplicationDelegate::~ShellApplicationDelegate() {}
 
 void ShellApplicationDelegate::Initialize(mojo::ApplicationImpl* app) {
   app_ = app;
   StartBrowserDriver();
   StartWindowManager();
   StartWallpaper();
   StartShelf();
   StartQuickLaunch();
 }
 
 bool ShellApplicationDelegate::ConfigureIncomingConnection(
     mojo::ApplicationConnection* connection) {
-  return false;
+  connection->AddService<mash::shell::mojom::Shell>(this);
+  return true;
+}
+
+void ShellApplicationDelegate::LockScreen() {
+  StartScreenlock();
+}
+void ShellApplicationDelegate::UnlockScreen() {
+  StopScreenlock();
+}
+
+void ShellApplicationDelegate::Create(
+    mojo::ApplicationConnection* connection,
+    mojo::InterfaceRequest<mash::shell::mojom::Shell> r) {
+  bindings_.AddBinding(this, std::move(r));
 }
 
 void ShellApplicationDelegate::StartWindowManager() {
   StartRestartableService(
       "mojo:desktop_wm",
       base::Bind(&ShellApplicationDelegate::StartWindowManager,
                  base::Unretained(this)));
 }
 
 void ShellApplicationDelegate::StartWallpaper() {
@@ skipping 15 matching lines @@
                  base::Unretained(this)));
 }
 
 void ShellApplicationDelegate::StartQuickLaunch() {
   StartRestartableService(
       "mojo:quick_launch",
       base::Bind(&ShellApplicationDelegate::StartQuickLaunch,
                  base::Unretained(this)));
 }
 
+void ShellApplicationDelegate::StartScreenlock() {
+  StartRestartableService(
+      "mojo:screenlock",
+      base::Bind(&ShellApplicationDelegate::StartScreenlock,
+                 base::Unretained(this)));
+}
+
+void ShellApplicationDelegate::StopScreenlock() {
+  auto connection = connections_.find("mojo:screenlock");
+  DCHECK(connections_.end() != connection);
+  mash::screenlock::mojom::ScreenlockPtr screenlock;
+  connection->second->ConnectToService(&screenlock);
+  screenlock->Quit();
+  connections_.erase(connection);
+}
+
 void ShellApplicationDelegate::StartRestartableService(
     const std::string& url,
     const base::Closure& restart_callback) {
   // TODO(beng): This would be the place to insert logic that counted restarts
   //             to avoid infinite crash-restart loops.
   scoped_ptr<mojo::ApplicationConnection> connection =
       app_->ConnectToApplication(url);
   connection->SetRemoteServiceProviderConnectionErrorHandler(restart_callback);
   connections_[url] = std::move(connection);
 }
 
 }  // namespace shell
 }  // namespace main