cros: Break BaseScreenHandler into two classes.

chrome/browser/ui/webui/chromeos/login/user_image_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/user_image_screen_handler.h"
 
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/logging.h"
@@ skipping 20 matching lines @@
 #include "url/gurl.h"
 
 namespace {
 
 const char kJsScreenPath[] = "login.UserImageScreen";
 
 }  // namespace
 
 namespace chromeos {
 
-UserImageScreenHandler::UserImageScreenHandler() {
+UserImageScreenHandler::UserImageScreenHandler()
+    : BaseScreenHandler(kScreenId) {
   set_call_js_prefix(kJsScreenPath);
   ui::ResourceBundle& bundle = ui::ResourceBundle::GetSharedInstance();
   media::SoundsManager* manager = media::SoundsManager::Get();
   manager->Initialize(SOUND_OBJECT_DELETE,
                       bundle.GetRawDataResource(IDR_SOUND_OBJECT_DELETE_WAV));
   manager->Initialize(SOUND_CAMERA_SNAP,
                       bundle.GetRawDataResource(IDR_SOUND_CAMERA_SNAP_WAV));
 }
 
 UserImageScreenHandler::~UserImageScreenHandler() {
@@ skipping 17 matching lines @@
   screen_ = nullptr;
   BaseScreenHandler::SetBaseScreen(nullptr);
 }
 
 void UserImageScreenHandler::Show() {
   if (!page_is_ready()) {
     show_on_init_ = true;
     return;
   }
   screen_show_time_ = base::Time::Now();
-  ShowScreen(OobeScreen::SCREEN_USER_IMAGE_PICKER);
+  ShowScreen(kScreenId);
 
   // When shown, query camera presence.
   if (screen_ && is_ready_)
     screen_->OnScreenReady();
 }
 
 void UserImageScreenHandler::Hide() {
 }
 
 void UserImageScreenHandler::DeclareLocalizedValues(
@@ skipping 99 matching lines @@
   base::TimeDelta delta = base::Time::Now() - screen_show_time_;
   VLOG(1) << "Screen load time: " << delta.InSecondsF();
   UMA_HISTOGRAM_TIMES("UserImage.ScreenIsShownTime", delta);
 }
 
 void UserImageScreenHandler::HideCurtain() {
   CallJS("hideCurtain");
 }
 
 }  // namespace chromeos