Remove app_shell chrome.shell API and ShellAppWindow

extensions/shell/browser/shell_desktop_controller.h

Index: extensions/shell/browser/shell_desktop_controller.h
diff --git a/extensions/shell/browser/shell_desktop_controller.h b/extensions/shell/browser/shell_desktop_controller.h
index d6d9d156fbe01930c4dac440f350aea8b5fb9e98..6e0d1c502cde63a603012849ee63841a3a862ced 100644
--- a/extensions/shell/browser/shell_desktop_controller.h
+++ b/extensions/shell/browser/shell_desktop_controller.h
@@ -51,7 +51,6 @@ class UserActivityDetector;
 namespace extensions {
 
 class Extension;
-class ShellAppWindow;
 
 // Handles desktop-related tasks for app_shell.
 class ShellDesktopController : public DesktopController,
@@ -67,9 +66,6 @@ class ShellDesktopController : public DesktopController,
 
   // DesktopController:
   virtual aura::WindowTreeHost* GetHost() OVERRIDE;
-  virtual ShellAppWindow* CreateShellAppWindow(
-      content::BrowserContext* context,
-      const Extension* extension) OVERRIDE;
   virtual AppWindow* CreateAppWindow(content::BrowserContext* context,
                                      const Extension* extension) OVERRIDE;
   virtual void AddAppWindow(aura::Window* window) OVERRIDE;
@@ -134,7 +130,6 @@ class ShellDesktopController : public DesktopController,
 #endif
 
   // The desktop supports a single app window.
-  scoped_ptr<ShellAppWindow> shell_app_window_;
   AppWindow* app_window_;  // NativeAppWindow::Close() deletes this.
 
   DISALLOW_COPY_AND_ASSIGN(ShellDesktopController);