[cros] Update wallpaper when displaying Gaia frame.

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

 // 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.
 
 #include "chrome/browser/ui/webui/chromeos/login/signin_screen_handler.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/callback.h"
 #include "base/command_line.h"
@@ skipping 286 matching lines @@
                  base::Unretained(this)));
   web_ui()->RegisterMessageCallback("offlineLogin",
       base::Bind(&SigninScreenHandler::HandleOfflineLogin,
                  base::Unretained(this)));
   web_ui()->RegisterMessageCallback("showAddUser",
       base::Bind(&SigninScreenHandler::HandleShowAddUser,
                  base::Unretained(this)));
   web_ui()->RegisterMessageCallback("shutdownSystem",
       base::Bind(&SigninScreenHandler::HandleShutdownSystem,
                  base::Unretained(this)));
-  web_ui()->RegisterMessageCallback("userSelectedDelayed",
-      base::Bind(&SigninScreenHandler::HandleUserSelected,
-                 base::Unretained(this)));
-  web_ui()->RegisterMessageCallback("userDeselected",
-      base::Bind(&SigninScreenHandler::HandleUserDeselected,
+  web_ui()->RegisterMessageCallback("loadWallpaper",
+      base::Bind(&SigninScreenHandler::HandleLoadWallpaper,
                  base::Unretained(this)));
   web_ui()->RegisterMessageCallback("removeUser",
       base::Bind(&SigninScreenHandler::HandleRemoveUser,
                  base::Unretained(this)));
   web_ui()->RegisterMessageCallback("toggleEnrollmentScreen",
       base::Bind(&SigninScreenHandler::HandleToggleEnrollmentScreen,
                  base::Unretained(this)));
   web_ui()->RegisterMessageCallback("toggleResetScreen",
       base::Bind(&SigninScreenHandler::HandleToggleResetScreen,
                  base::Unretained(this)));
@@ skipping 145 matching lines @@
   if (gaia_silent_load_ &&
       (!network_state_informer_->is_online() ||
        gaia_silent_load_network_ !=
           network_state_informer_->active_network_id())) {
     // Network has changed. Force Gaia reload.
     gaia_silent_load_ = false;
     // Gaia page will be realoded, so focus isn't stolen anymore.
     focus_stolen_ = false;
   }
 
+  // Note that LoadAuthExtension clears |email_|.
+  if (email_.empty())
+    delegate_->LoadSigninWallpaper();
+  else
+    delegate_->LoadWallpaper(email_);
+
   LoadAuthExtension(!gaia_silent_load_, false, false);
   ShowScreen(kGaiaSigninScreen, NULL);
 
   if (gaia_silent_load_) {
     // The variable is assigned to false because silently loaded Gaia page was
     // used.
     gaia_silent_load_ = false;
     if (focus_stolen_)
       HandleLoginWebuiReady(NULL);
   }
@@ skipping 138 matching lines @@
 
 void SigninScreenHandler::HandleShutdownSystem(const base::ListValue* args) {
 #if defined(USE_AURA)
   // Display the shutdown animation before actually requesting shutdown.
   ash::Shell::GetInstance()->power_button_controller()->RequestShutdown();
 #else
   DBusThreadManager::Get()->GetPowerManagerClient()->RequestShutdown();
 #endif
 }
 
-void SigninScreenHandler::HandleUserDeselected(const base::ListValue* args) {
-  if (delegate_)
-    delegate_->OnUserDeselected();
-}
-
-void SigninScreenHandler::HandleUserSelected(const base::ListValue* args) {
+void SigninScreenHandler::HandleLoadWallpaper(const base::ListValue* args) {
   if (!delegate_)
     return;
 
   std::string email;
   if (!args->GetString(0, &email)) {
     NOTREACHED();
     return;
   }
 
-  delegate_->OnUserSelected(email);
+  delegate_->LoadWallpaper(email);
 }
 
 void SigninScreenHandler::HandleRemoveUser(const base::ListValue* args) {
   if (!delegate_)
     return;
 
   std::string email;
   if (!args->GetString(0, &email)) {
     NOTREACHED();
     return;
@@ skipping 332 matching lines @@
                                     ConnectionType last_network_type) {
   base::FundamentalValue state_value(state);
   base::StringValue network_value(network_name);
   base::StringValue reason_value(reason);
   base::FundamentalValue last_network_value(last_network_type);
   web_ui()->CallJavascriptFunction(callback,
       state_value, network_value, reason_value, last_network_value);
 }
 
 }  // namespace chromeos