app_shell: Add audio and video capture support

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"
@@ skipping 32 matching lines @@
 namespace wm {
 class CompoundEventFilter;
 class CursorManager;
 class FocusRules;
 class InputMethodEventFilter;
 class UserActivityDetector;
 }
 
 namespace extensions {
 
+class Extension;
 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
 #endif
@@ skipping 10 matching lines @@
   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);
+  // ownership of the window. The window must be closed before |extension| is
+  // destroyed.
+  ShellAppWindow* CreateAppWindow(content::BrowserContext* context,
+                                  const Extension* extension);
 
   // 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:
   virtual aura::Window* GetDefaultParent(aura::Window* context,
                                          aura::Window* window,
@@ skipping 49 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_