[ABANDONED] Simplify 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 180 matching lines @@
         (contents_bounds.height() - foreground_bounds.height()) / 2);
     foreground_bounds.set_y(
         (contents_bounds.width() - foreground_bounds.width()) / 2);
   }
   canvas->DrawImageInt(foreground_image, foreground_bounds.x(),
                        foreground_bounds.y());
 }
 
 void AppListButton::PaintAppListButton(gfx::Canvas* canvas,
                                        const gfx::ImageSkia& foreground_image) {
-  int background_image_id = 0;
+  int background_image_id = IDR_AURA_NOTIFICATION_BACKGROUND_NORMAL;
 
   if (WmShell::Get()->GetAppListTargetVisibility() ||
       draw_background_as_active_) {
     background_image_id = IDR_AURA_NOTIFICATION_BACKGROUND_PRESSED;
-  } else {
-    if (wm_shelf_->IsDimmed()) {
-      background_image_id = IDR_AURA_NOTIFICATION_BACKGROUND_ON_BLACK;
-    } else {
-      background_image_id = IDR_AURA_NOTIFICATION_BACKGROUND_NORMAL;
-    }
+  } else if (wm_shelf_->GetBackgroundType() == SHELF_BACKGROUND_MAXIMIZED) {
+    background_image_id = IDR_AURA_NOTIFICATION_BACKGROUND_ON_BLACK;
   }
 
   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();
 
   if (alignment == SHELF_ALIGNMENT_LEFT) {
@@ skipping 65 matching lines @@
 }
 
 void AppListButton::SetDrawBackgroundAsActive(bool draw_background_as_active) {
   if (draw_background_as_active_ == draw_background_as_active)
     return;
   draw_background_as_active_ = draw_background_as_active;
   SchedulePaint();
 }
 
 }  // namespace ash