Remove Ash shelf dimmer.

ash/common/shelf/shelf_view.cc

 // Copyright (c) 2012 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/shelf_view.h"
 
 #include <algorithm>
 #include <memory>
 
 #include "ash/common/ash_constants.h"
@@ skipping 1825 matching lines @@
         break;
       case SHELF_ALIGNMENT_LEFT:
         menu_alignment = views::MENU_ANCHOR_BUBBLE_RIGHT;
         break;
       case SHELF_ALIGNMENT_RIGHT:
         menu_alignment = views::MENU_ANCHOR_BUBBLE_LEFT;
         break;
     }
   }
 
-  shelf_widget_->ForceUndimming(true);
   // NOTE: if you convert to HAS_MNEMONICS be sure to update menu building code.
   launcher_menu_runner_->RunMenuAt(source->GetWidget(), nullptr, anchor,
                                    menu_alignment, source_type);
 }
 
 void ShelfView::OnMenuClosed(views::InkDrop* ink_drop) {
   context_menu_id_ = 0;
-  shelf_widget_->ForceUndimming(false);
 
   // Hide the hide overflow bubble after showing a context menu for its items.
   if (owner_overflow_bubble_)
     owner_overflow_bubble_->Hide();
 
   closing_event_time_ = launcher_menu_runner_->closing_event_time();
 
   if (ink_drop)
     ink_drop->AnimateToState(views::InkDropState::DEACTIVATED);
 
@@ skipping 48 matching lines @@
 
 int ShelfView::CalculateShelfDistance(const gfx::Point& coordinate) const {
   const gfx::Rect bounds = GetBoundsInScreen();
   int distance = wm_shelf_->SelectValueForShelfAlignment(
       bounds.y() - coordinate.y(), coordinate.x() - bounds.right(),
       bounds.x() - coordinate.x());
   return distance > 0 ? distance : 0;
 }
 
 }  // namespace ash