[cros] Update wallpaper when displaying Gaia frame.

chrome/browser/ui/webui/chromeos/login/signin_screen_handler.h

 // Copyright (c) 2012 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 CHROME_BROWSER_UI_WEBUI_CHROMEOS_LOGIN_SIGNIN_SCREEN_HANDLER_H_
 #define CHROME_BROWSER_UI_WEBUI_CHROMEOS_LOGIN_SIGNIN_SCREEN_HANDLER_H_
 
 #include <string>
 
 #include "base/hash_tables.h"
@@ skipping 60 matching lines @@
 
   // Sign in into Guest session.
   virtual void LoginAsGuest() = 0;
 
   // Signs out if the screen is currently locked.
   virtual void Signout() = 0;
 
   // Create a new Google account.
   virtual void CreateAccount() = 0;
 
-  // Called user pod selection is canceled.
-  virtual void OnUserDeselected() = 0;
+  // Load wallpaper for given |username|.
+  virtual void LoadWallpaper(const std::string& username) = 0;
 
-  // Called when user pod with |username| is selected at login screen.
-  // |username| is the email address of the selected user.
-  virtual void OnUserSelected(const std::string& username) = 0;
+  // Loads the default sign-in wallpaper.
+  virtual void LoadSigninWallpaper() = 0;
 
   // Attempts to remove given user.
   virtual void RemoveUser(const std::string& username) = 0;
 
   // Shows Enterprise Enrollment screen.
   virtual void ShowEnterpriseEnrollmentScreen() = 0;
 
   // Shows Reset screen.
   virtual void ShowResetScreen() = 0;
 
@@ skipping 110 matching lines @@
   void UpdateAddButtonStatus();
 
   // WebUI message handlers.
   void HandleCompleteLogin(const base::ListValue* args);
   void HandleGetUsers(const base::ListValue* args);
   void HandleAuthenticateUser(const base::ListValue* args);
   void HandleLaunchDemoUser(const base::ListValue* args);
   void HandleLaunchIncognito(const base::ListValue* args);
   void HandleOfflineLogin(const base::ListValue* args);
   void HandleShutdownSystem(const base::ListValue* args);
-  void HandleUserDeselected(const base::ListValue* args);
-  void HandleUserSelected(const base::ListValue* args);
+  void HandleLoadWallpaper(const base::ListValue* args);
   void HandleRemoveUser(const base::ListValue* args);
   void HandleShowAddUser(const base::ListValue* args);
   void HandleToggleEnrollmentScreen(const base::ListValue* args);
   void HandleToggleResetScreen(const base::ListValue* args);
   void HandleLaunchHelpApp(const base::ListValue* args);
   void HandleCreateAccount(const base::ListValue* args);
   void HandleAccountPickerReady(const base::ListValue* args);
   void HandleWallpaperReady(const base::ListValue* args);
   void HandleLoginWebuiReady(const base::ListValue* args);
   void HandleLoginRequestNetworkState(const base::ListValue* args);
@@ skipping 90 matching lines @@
 
   // Sign-in screen WebUI observers of network state.
   WebUIObservers observers_;
 
   DISALLOW_COPY_AND_ASSIGN(SigninScreenHandler);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_UI_WEBUI_CHROMEOS_LOGIN_SIGNIN_SCREEN_HANDLER_H_