app_shell: Shut down in response to power button.

extensions/shell/browser/shell_desktop_controller.h

 // Copyright 2014 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 EXTENSIONS_SHELL_BROWSER_SHELL_DESKTOP_CONTROLLER_H_
 #define EXTENSIONS_SHELL_BROWSER_SHELL_DESKTOP_CONTROLLER_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "ui/aura/client/window_tree_client.h"
 #include "ui/aura/window_tree_host_observer.h"
 
 #if defined(OS_CHROMEOS)
+#include "chromeos/dbus/power_manager_client.h"
 #include "ui/display/chromeos/display_configurator.h"
 #endif
 
 namespace aura {
 class TestScreen;
 class Window;
 class WindowTreeHost;
 namespace client {
 class DefaultCaptureClient;
 class FocusClient;
@@ skipping 23 matching lines @@
 class UserActivityDetector;
 }
 
 namespace extensions {
 
 class ShellAppWindow;
 class ShellAppWindowController;
 
 // Handles desktop-related tasks for app_shell.
 class ShellDesktopController : public aura::client::WindowTreeClient,
-                               public aura::WindowTreeHostObserver
 #if defined(OS_CHROMEOS)
-                               ,
-                               public ui::DisplayConfigurator::Observer
+                               public chromeos::PowerManagerClient::Observer,
+                               public ui::DisplayConfigurator::Observer,
 #endif
-                               {
+                               public aura::WindowTreeHostObserver {
  public:
   ShellDesktopController();
   virtual ~ShellDesktopController();
 
   // Returns the single instance of the desktop. (Stateless functions like
   // ShellAppWindowCreateFunction need to be able to access the desktop, so
   // we need a singleton somewhere).
   static ShellDesktopController* instance();
 
   aura::WindowTreeHost* host() { return host_.get(); }
 
-  // Creates the window that hosts the app.
-  void CreateRootWindow();
-
   // Sets the controller to create/close the app windows. Takes the ownership of
   // |app_window_controller|.
   void SetAppWindowController(ShellAppWindowController* app_window_controller);
 
   // Creates a new app window and adds it to the desktop. The desktop maintains
   // ownership of the window.
   ShellAppWindow* CreateAppWindow(content::BrowserContext* context);
 
   // Closes and destroys the app windows.
   void CloseAppWindows();
 
   // Sets the screen's work area insets.
   void SetDisplayWorkAreaInsets(const gfx::Insets& insets);
 
-  // Overridden from aura::client::WindowTreeClient:
+  // aura::client::WindowTreeClient overrides:
   virtual aura::Window* GetDefaultParent(aura::Window* context,
                                          aura::Window* window,
                                          const gfx::Rect& bounds) OVERRIDE;
 
 #if defined(OS_CHROMEOS)
+  // chromeos::PowerManagerClient::Observer overrides:
+  virtual void PowerButtonEventReceived(bool down,
+                                        const base::TimeTicks& timestamp)
+      OVERRIDE;
+
   // ui::DisplayConfigurator::Observer overrides.
   virtual void OnDisplayModeChanged(const std::vector<
       ui::DisplayConfigurator::DisplayState>& displays) OVERRIDE;
 #endif
 
   // aura::WindowTreeHostObserver overrides:
   virtual void OnHostCloseRequested(const aura::WindowTreeHost* host) OVERRIDE;
 
  protected:
   // Creates and sets the aura clients and window manager stuff. Subclass may
   // initialize different sets of the clients.
   virtual void InitWindowManager();
 
   // Creates a focus rule that is to be used in the InitWindowManager.
   virtual wm::FocusRules* CreateFocusRules();
 
  private:
+  // Creates the window that hosts the app.
+  void CreateRootWindow();
+
   // Closes and destroys the root window hosting the app.
   void DestroyRootWindow();
 
   // Returns the dimensions (in pixels) of the primary display, or an empty size
   // if the dimensions can't be determined or no display is connected.
   gfx::Size GetPrimaryDisplaySize();
 
 #if defined(OS_CHROMEOS)
   scoped_ptr<ui::DisplayConfigurator> display_configurator_;
 #endif
@@ skipping 19 matching lines @@
 
   // The desktop supports a single app window.
   scoped_ptr<ShellAppWindowController> app_window_controller_;
 
   DISALLOW_COPY_AND_ASSIGN(ShellDesktopController);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_SHELL_BROWSER_SHELL_DESKTOP_CONTROLLER_H_