Remove Ash shelf dimmer.

ash/common/shelf/app_list_button.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/shelf/app_list_button.h"
 
 #include "ash/common/ash_constants.h"
 #include "ash/common/material_design/material_design_controller.h"
 #include "ash/common/shelf/ink_drop_button_listener.h"
 #include "ash/common/shelf/shelf_constants.h"
@@ skipping 175 matching lines @@
   canvas->DrawCircle(circle_center, radius, fg_paint);
 }
 
 void AppListButton::PaintAppListButton(gfx::Canvas* canvas,
                                        const gfx::ImageSkia& foreground_image) {
   int background_image_id = 0;
 
   if (WmShell::Get()->GetAppListTargetVisibility() ||
       draw_background_as_active_) {
     background_image_id = IDR_AURA_LAUNCHER_BACKGROUND_PRESSED;
-  } else if (wm_shelf_->IsDimmed()) {
-    background_image_id = IDR_AURA_LAUNCHER_BACKGROUND_ON_BLACK;
   } else {
     background_image_id = IDR_AURA_LAUNCHER_BACKGROUND_NORMAL;
   }
 
   ResourceBundle& rb = ResourceBundle::GetSharedInstance();
   gfx::ImageSkia background_image =
       *rb.GetImageNamed(background_image_id).ToImageSkia();
   gfx::Rect background_bounds(background_image.size());
   ShelfAlignment alignment = wm_shelf_->GetAlignment();
   gfx::Rect contents_bounds = GetContentsBounds();
@@ skipping 87 matching lines @@
   int center = std::max(width(), height()) / 2.f;
   gfx::Point centroid(center, center);
   // For the left shelf alignment, we need to right-justify. For other shelf
   // alignments, left/top justification (i.e. no adjustments are necessary).
   if (SHELF_ALIGNMENT_LEFT == wm_shelf_->GetAlignment())
     centroid.set_x(width() - center);
   return centroid;
 }
 
 }  // namespace ash