Re-implement the screensaver to use WebView instead of ExtensionDialogHost.

chrome/browser/chromeos/ui/screensaver_extension_dialog.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/chromeos/ui/screensaver_extension_dialog.h"
-
-#include "base/bind.h"
-#include "base/logging.h"
-#include "base/memory/ref_counted.h"
-#include "chrome/browser/chromeos/kiosk_mode/kiosk_mode_settings.h"
-#include "chrome/browser/extensions/extension_service.h"
-#include "chrome/browser/profiles/profile.h"
-#include "chrome/browser/profiles/profile_manager.h"
-#include "chrome/browser/sessions/restore_tab_helper.h"
-#include "chrome/browser/ui/views/extensions/extension_dialog.h"
-#include "chrome/common/chrome_switches.h"
-#include "chrome/common/extensions/extension.h"
-#include "chrome/common/extensions/extension_file_util.h"
-
-using content::BrowserThread;
-
-namespace {
-
-ScreensaverExtensionDialog* g_instance = NULL;
-
-}  // namespace
-
-namespace browser {
-
-void ShowScreensaverDialog(scoped_refptr<Extension> extension) {
-  ScreensaverExtensionDialog::ShowScreensaverDialog(extension);
-}
-
-void CloseScreensaverDialog() {
-  ScreensaverExtensionDialog::CloseScreensaverDialog();
-}
-
-}  // namespace browser
-
-// static
-void ScreensaverExtensionDialog::ShowScreensaverDialog(
-    scoped_refptr<Extension> extension) {
-  if (!g_instance)
-    g_instance = new ScreensaverExtensionDialog(extension);
-  g_instance->Show();
-}
-
-// static
-void ScreensaverExtensionDialog::CloseScreensaverDialog() {
-  if (g_instance)
-    g_instance->Close();
-}
-
-ScreensaverExtensionDialog::ScreensaverExtensionDialog(
-    scoped_refptr<Extension> extension)
-    : screensaver_extension_(extension) {
-}
-
-void ScreensaverExtensionDialog::Show() {
-  if (!screensaver_extension_)
-    return;
-
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-  Profile* default_profile = ProfileManager::GetDefaultProfile();
-  default_profile->GetExtensionService()->AddExtension(screensaver_extension_);
-  extension_dialog_ = ExtensionDialog::ShowFullscreen(
-      screensaver_extension_->GetFullLaunchURL(),
-      default_profile,
-      string16(),
-      this);
-}
-
-void ScreensaverExtensionDialog::Close() {
-  if (extension_dialog_) {
-    extension_dialog_->Close();
-    extension_dialog_ = NULL;
-  }
-}
-
-ScreensaverExtensionDialog::~ScreensaverExtensionDialog() {
-  if (extension_dialog_)
-    extension_dialog_->ObserverDestroyed();
-}
-
-void ScreensaverExtensionDialog::ExtensionDialogClosing(
-    ExtensionDialog* dialog) {
-  // Release our reference to the dialog to allow it to close.
-  extension_dialog_ = NULL;
-}
-
-void ScreensaverExtensionDialog::ExtensionTerminated(
-    ExtensionDialog* dialog) {
-  // This needs to be run 'slightly' delayed. When we get the extension
-  // terminated notification, the extension isn't fully unloaded yet. There
-  // is no good way to get around this. The correct solution will be to
-  // not need to reload the extension at all - but the current wiring in
-  // ExtensionViewsHost makes that not possible.
-  MessageLoop::current()->PostTask(FROM_HERE,
-      base::Bind(&ScreensaverExtensionDialog::ReloadAndShow,
-          base::Unretained(this)));
-  dialog->Close();
-}
-
-void ScreensaverExtensionDialog::ReloadAndShow() {
-  ProfileManager::GetDefaultProfile()->GetExtensionService()->ReloadExtension(
-      screensaver_extension_->id());
-
-  Show();
-}