chromeos: Rename ash::WmShelf to Shelf

ash/system/overview/overview_button_tray.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/system/overview/overview_button_tray.h"
 
 #include "ash/resources/vector_icons/vector_icons.h"
 #include "ash/session/session_controller.h"
 #include "ash/shelf/shelf_constants.h"
 #include "ash/shell.h"
 #include "ash/shell_port.h"
 #include "ash/strings/grit/ash_strings.h"
 #include "ash/system/tray/tray_constants.h"
 #include "ash/system/tray/tray_container.h"
 #include "ash/wm/maximize_mode/maximize_mode_controller.h"
 #include "ash/wm/mru_window_tracker.h"
 #include "ash/wm/overview/window_selector_controller.h"
 #include "ash/wm_window.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/gfx/paint_vector_icon.h"
 #include "ui/views/border.h"
 #include "ui/views/controls/image_view.h"
 #include "ui/wm/core/window_util.h"
 
 namespace ash {
 
-OverviewButtonTray::OverviewButtonTray(WmShelf* wm_shelf)
-    : TrayBackgroundView(wm_shelf),
+OverviewButtonTray::OverviewButtonTray(Shelf* shelf)
+    : TrayBackgroundView(shelf),
       icon_(new views::ImageView()),
       scoped_session_observer_(this) {
   SetInkDropMode(InkDropMode::ON);
 
   gfx::ImageSkia image =
       gfx::CreateVectorIcon(kShelfOverviewIcon, kShelfIconColor);
   icon_->SetImage(image);
   const int vertical_padding = (kTrayItemSize - image.height()) / 2;
   const int horizontal_padding = (kTrayItemSize - image.width()) / 2;
   icon_->SetBorder(views::CreateEmptyBorder(
@@ skipping 90 matching lines @@
   SetVisible(
       shell->maximize_mode_controller()->IsMaximizeModeWindowManagerEnabled() &&
       session_controller->IsActiveUserSessionStarted() &&
       !session_controller->IsScreenLocked() &&
       session_controller->GetSessionState() ==
           session_manager::SessionState::ACTIVE &&
       !session_controller->IsKioskSession());
 }
 
 }  // namespace ash