Promotes more accessors from WmShell to Shell

ash/common/system/chromeos/session/tray_session_length_limit.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 "ash/common/system/chromeos/session/tray_session_length_limit.h"
 
 #include <algorithm>
 #include <memory>
 #include <utility>
 
 #include "ash/common/system/system_notifier.h"
 #include "ash/common/system/tray/label_tray_view.h"
 #include "ash/common/system/tray/system_tray.h"
 #include "ash/common/system/tray/system_tray_delegate.h"
 #include "ash/common/system/tray/system_tray_notifier.h"
-#include "ash/common/wm_shell.h"
 #include "ash/resources/grit/ash_resources.h"
 #include "ash/shell.h"
 #include "ash/strings/grit/ash_strings.h"
 #include "base/logging.h"
 #include "base/strings/utf_string_conversions.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/l10n/time_format.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/message_center/message_center.h"
 #include "ui/message_center/notification.h"
@@ skipping 15 matching lines @@
 
 // static
 const char TraySessionLengthLimit::kNotificationId[] =
     "chrome://session/timeout";
 
 TraySessionLengthLimit::TraySessionLengthLimit(SystemTray* system_tray)
     : SystemTrayItem(system_tray, UMA_SESSION_LENGTH_LIMIT),
       limit_state_(LIMIT_NONE),
       last_limit_state_(LIMIT_NONE),
       tray_bubble_view_(NULL) {
-  WmShell::Get()->system_tray_notifier()->AddSessionLengthLimitObserver(this);
+  Shell::Get()->system_tray_notifier()->AddSessionLengthLimitObserver(this);
   Update();
 }
 
 TraySessionLengthLimit::~TraySessionLengthLimit() {
-  WmShell::Get()->system_tray_notifier()->RemoveSessionLengthLimitObserver(
-      this);
+  Shell::Get()->system_tray_notifier()->RemoveSessionLengthLimitObserver(this);
 }
 
 // Add view to tray bubble.
 views::View* TraySessionLengthLimit::CreateDefaultView(LoginStatus status) {
   CHECK(!tray_bubble_view_);
   UpdateState();
   if (limit_state_ == LIMIT_NONE)
     return NULL;
   tray_bubble_view_ =
       new LabelTrayView(NULL /* click_listener */,
@@ skipping 119 matching lines @@
 
 base::string16 TraySessionLengthLimit::ComposeTrayBubbleMessage() const {
   return l10n_util::GetStringFUTF16(
       IDS_ASH_STATUS_TRAY_BUBBLE_SESSION_LENGTH_LIMIT,
       ui::TimeFormat::Detailed(ui::TimeFormat::FORMAT_DURATION,
                                ui::TimeFormat::LENGTH_LONG, 10,
                                remaining_session_time_));
 }
 
 }  // namespace ash