Delay wallpaper load by 2 * average wallpaper load time.

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

 // Copyright (c) 2013 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/callback.h"
 #include "base/chromeos/chromeos_version.h"
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
@@ skipping 373 matching lines @@
       oobe_ui_(false),
       focus_stolen_(false),
       gaia_silent_load_(false),
       is_account_picker_showing_first_time_(false),
       dns_cleared_(false),
       dns_clear_task_running_(false),
       cookies_cleared_(false),
       network_state_informer_(network_state_informer),
       test_expects_complete_login_(false),
       weak_factory_(this),
+      weak_factory_as_observer_(this),
       webui_visible_(false),
       preferences_changed_delayed_(false),
       error_screen_actor_(error_screen_actor),
       core_oobe_actor_(core_oobe_actor),
       is_first_update_state_call_(true),
       offline_login_active_(false),
       last_network_state_(NetworkStateInformer::UNKNOWN),
       has_pending_auth_ui_(false) {
   DCHECK(network_state_informer_.get());
   DCHECK(error_screen_actor_);
@@ skipping 143 matching lines @@
     UpdateUIState(UI_STATE_ACCOUNT_PICKER, &params);
   }
 }
 
 void SigninScreenHandler::ShowRetailModeLoginSpinner() {
   CallJS("showLoginSpinner");
 }
 
 void SigninScreenHandler::SetDelegate(SigninScreenHandlerDelegate* delegate) {
   delegate_ = delegate;
-  if (delegate_)
+  if (delegate_) {
     delegate_->SetWebUIHandler(this);
+    WallpaperManager::Get()->AddObserver(
+        weak_factory_as_observer_.GetWeakPtr());
+  }
 }
 
 void SigninScreenHandler::SetNativeWindowDelegate(
     NativeWindowDelegate* native_window_delegate) {
   native_window_delegate_ = native_window_delegate;
 }
 
 void SigninScreenHandler::OnNetworkReady() {
   MaybePreloadAuthExtension();
 }
@@ skipping 709 matching lines @@
 
 void SigninScreenHandler::HandleShutdownSystem() {
   ash::Shell::GetInstance()->lock_state_controller()->RequestShutdown();
 }
 
 void SigninScreenHandler::HandleLoadWallpaper(const std::string& email) {
   if (delegate_)
     delegate_->LoadWallpaper(email);
 }
 
+void SigninScreenHandler::OnWallpaperAnimationFinished(
+    const std::string& email) {
+  CallJS("login.AccountPickerScreen.onWallpaperLoaded", email);
+}
+
 void SigninScreenHandler::HandleRebootSystem() {
   chromeos::DBusThreadManager::Get()->GetPowerManagerClient()->RequestRestart();
 }
 
 void SigninScreenHandler::HandleRemoveUser(const std::string& email) {
   if (!delegate_)
     return;
   delegate_->RemoveUser(email);
   UpdateAddButtonStatus();
 }
@@ skipping 474 matching lines @@
   rvh->ExecuteJavascriptInWebFrame(
       ASCIIToUTF16("//iframe[@id='signin-frame']\n//iframe"),
       ASCIIToUTF16(code));
 
   // Test properties are cleared in HandleCompleteLogin because the form
   // submission might fail and login will not be attempted after reloading
   // if they are cleared here.
 }
 
 }  // namespace chromeos