Removes WmShelfAura and WmShelfMus

ash/aura/wm_shelf_aura.cc

-// Copyright 2016 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/aura/wm_shelf_aura.h"
-
-#include "ash/aura/wm_window_aura.h"
-#include "ash/common/shelf/shelf_layout_manager.h"
-#include "ash/shelf/shelf_bezel_event_handler.h"
-#include "ash/shell.h"
-
-namespace ash {
-
-// WmShelfAura::AutoHideEventHandler -------------------------------------------
-
-// Forwards mouse and gesture events to ShelfLayoutManager for auto-hide.
-// TODO(mash): Add similar event handling support for mash.
-class WmShelfAura::AutoHideEventHandler : public ui::EventHandler {
- public:
-  explicit AutoHideEventHandler(ShelfLayoutManager* shelf_layout_manager)
-      : shelf_layout_manager_(shelf_layout_manager) {
-    Shell::GetInstance()->AddPreTargetHandler(this);
-  }
-  ~AutoHideEventHandler() override {
-    Shell::GetInstance()->RemovePreTargetHandler(this);
-  }
-
-  // Overridden from ui::EventHandler:
-  void OnMouseEvent(ui::MouseEvent* event) override {
-    shelf_layout_manager_->UpdateAutoHideForMouseEvent(
-        event, WmWindowAura::Get(static_cast<aura::Window*>(event->target())));
-  }
-  void OnGestureEvent(ui::GestureEvent* event) override {
-    shelf_layout_manager_->UpdateAutoHideForGestureEvent(
-        event, WmWindowAura::Get(static_cast<aura::Window*>(event->target())));
-  }
-
- private:
-  ShelfLayoutManager* shelf_layout_manager_;
-  DISALLOW_COPY_AND_ASSIGN(AutoHideEventHandler);
-};
-
-// WmShelfAura -----------------------------------------------------------------
-
-WmShelfAura::WmShelfAura() {}
-
-WmShelfAura::~WmShelfAura() {}
-
-void WmShelfAura::CreateShelfWidget(WmWindow* root) {
-  WmShelf::CreateShelfWidget(root);
-  bezel_event_handler_.reset(new ShelfBezelEventHandler(this));
-}
-
-void WmShelfAura::WillDeleteShelfLayoutManager() {
-  // Clear event handlers that might forward events to the destroyed instance.
-  auto_hide_event_handler_.reset();
-  bezel_event_handler_.reset();
-  WmShelf::WillDeleteShelfLayoutManager();
-}
-
-void WmShelfAura::WillChangeVisibilityState(ShelfVisibilityState new_state) {
-  WmShelf::WillChangeVisibilityState(new_state);
-  if (new_state != SHELF_AUTO_HIDE) {
-    auto_hide_event_handler_.reset();
-  } else if (!auto_hide_event_handler_) {
-    auto_hide_event_handler_.reset(
-        new AutoHideEventHandler(shelf_layout_manager()));
-  }
-}
-
-}  // namespace ash