mash: Make the power button shut the system down.

ash/mus/bridge/wm_shell_mus.cc

 // Copyright 2016 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 "ash/mus/bridge/wm_shell_mus.h"
 
 #include <utility>
 
 #include "ash/common/accelerators/accelerator_controller.h"
 #include "ash/common/key_event_watcher.h"
@@ skipping 45 matching lines @@
  public:
   SessionStateDelegateStub()
       : screen_locked_(false), user_info_(new user_manager::UserInfoImpl()) {}
 
   ~SessionStateDelegateStub() override {}
 
   // SessionStateDelegate:
   int GetMaximumNumberOfLoggedInUsers() const override { return 3; }
   int NumberOfLoggedInUsers() const override { return 1; }
   bool IsActiveUserSessionStarted() const override { return true; }
-  bool CanLockScreen() const override { return true; }
+  bool CanLockScreen() const override {
+    // The Chrome OS session_manager process currently rejects screen-lock
+    // requests due to no user being logged in.
+    return false;
+  }
   bool IsScreenLocked() const override { return screen_locked_; }
   bool ShouldLockScreenAutomatically() const override { return false; }
   void LockScreen() override {
     screen_locked_ = true;
     NOTIMPLEMENTED();
   }
   void UnlockScreen() override {
     NOTIMPLEMENTED();
     screen_locked_ = false;
   }
@@ skipping 305 matching lines @@
   // TODO: implement drags for mus pointer watcher, http://crbug.com/641164.
   // NOTIMPLEMENTED drags for mus pointer watcher.
   pointer_watcher_event_router_->AddPointerWatcher(
       watcher, events == views::PointerWatcherEventTypes::MOVES);
 }
 
 void WmShellMus::RemovePointerWatcher(views::PointerWatcher* watcher) {
   pointer_watcher_event_router_->RemovePointerWatcher(watcher);
 }
 
-void WmShellMus::RequestShutdown() {
-  NOTIMPLEMENTED();
-}
-
 bool WmShellMus::IsTouchDown() {
   // TODO: implement me, http://crbug.com/634967.
   // NOTIMPLEMENTED is too spammy here.
   return false;
 }
 
 void WmShellMus::ToggleIgnoreExternalKeyboard() {
   NOTIMPLEMENTED();
 }
 
 void WmShellMus::SetLaserPointerEnabled(bool enabled) {
   NOTIMPLEMENTED();
 }
 
 void WmShellMus::CreatePointerWatcherAdapter() {
   // Only needed in WmShellAura, which has specific creation order.
 }
 
 void WmShellMus::CreatePrimaryHost() {}
 
 void WmShellMus::InitHosts(const ShellInitParams& init_params) {
   window_manager_->CreatePrimaryRootWindowController(
       base::WrapUnique(init_params.primary_window_tree_host));
 }
 }  // namespace mus
 }  // namespace ash