cros: Various fixes needed for preloading lock screen.

chrome/browser/chromeos/login/lock/webui_screen_locker.cc

 // 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.
 
 #include "chrome/browser/chromeos/login/lock/webui_screen_locker.h"
 
 #include "ash/common/wm_shell.h"
 #include "ash/shell.h"
 #include "ash/system/chromeos/power/power_event_observer.h"
 #include "base/command_line.h"
@@ skipping 88 matching lines @@
 
 // static
 void WebUIScreenLocker::Preload() {
   DCHECK(ShouldShareLockScreen());
   VLOG(1) << "Preloading lock screen";
 
   SharedWebView* shared_web_view =
       SharedWebViewFactory::GetForProfile(ProfileHelper::GetSigninProfile());
 
   scoped_refptr<WebViewHandle> web_view_handle;
-  if (!shared_web_view->Get(GURL(kLoginURL), &web_view_handle)) {
+  if (!shared_web_view->has_web_view() &&
+      !shared_web_view->Get(GURL(kLoginURL), &web_view_handle)) {
     web_view_handle->web_view()->LoadInitialURL(GURL(kLoginURL));
     InitializeWebView(
         web_view_handle->web_view(),
         l10n_util::GetStringUTF16(IDS_LOCK_SCREEN_TASK_MANAGER_NAME));
   }
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // WebUIScreenLocker implementation.
 
@@ skipping 330 matching lines @@
   }
 
   if (GetOobeUI()) {
     const gfx::Size& size = primary_display.size();
     GetOobeUI()->GetCoreOobeActor()->SetClientAreaSize(size.width(),
                                                        size.height());
   }
 }
 
 }  // namespace chromeos