Remove Ash shelf dimmer.

ash/common/shelf/wm_shelf.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/common/shelf/wm_shelf.h"
 
 #include "ash/common/shelf/shelf_controller.h"
 #include "ash/common/shelf/shelf_delegate.h"
 #include "ash/common/shelf/shelf_item_delegate.h"
 #include "ash/common/shelf/shelf_layout_manager.h"
@@ skipping 182 matching lines @@
 }
 
 void WmShelf::UpdateAutoHideState() {
   shelf_layout_manager_->UpdateAutoHideState();
 }
 
 ShelfBackgroundType WmShelf::GetBackgroundType() const {
   return shelf_widget_->GetBackgroundType();
 }
 
-WmDimmerView* WmShelf::CreateDimmerView(bool disable_animations_for_test) {
-  return nullptr;
-}
-
-bool WmShelf::IsDimmed() const {
-  return shelf_widget_->GetDimsShelf();
-}
-
 bool WmShelf::IsVisible() const {
   return shelf_widget_->IsShelfVisible();
 }
 
 void WmShelf::UpdateVisibilityState() {
   if (shelf_layout_manager_)
     shelf_layout_manager_->UpdateVisibilityState();
 }
 
 ShelfVisibilityState WmShelf::GetVisibilityState() const {
@@ skipping 118 matching lines @@
 
 void WmShelf::OnBackgroundUpdated(ShelfBackgroundType background_type,
                                   BackgroundAnimatorChangeType change_type) {
   if (background_type == GetBackgroundType())
     return;
   for (auto& observer : observers_)
     observer.OnBackgroundTypeChanged(background_type, change_type);
 }
 
 }  // namespace ash