[exp] ash: sysui for mash

ash/system/tray/tray_background_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/system/tray/tray_background_view.h"
 
 #include "ash/root_window_controller.h"
 #include "ash/screen_util.h"
 #include "ash/shelf/shelf_layout_manager.h"
 #include "ash/shelf/shelf_widget.h"
@@ skipping 93 matching lines @@
   }
 
   ~TrayBackground() override {}
 
   SkColor color() { return color_; }
   void set_color(SkColor color) { color_ = color; }
   void set_alpha(int alpha) { color_ = SkColorSetARGB(alpha, 0, 0, 0); }
 
  private:
   ShelfWidget* GetShelfWidget() const {
-    return RootWindowController::ForWindow(tray_background_view_->
-        status_area_widget()->GetNativeWindow())->shelf();
+    return tray_background_view_->GetShelfLayoutManager()->shelf_widget();
   }
 
   // Overridden from views::Background.
   void Paint(gfx::Canvas* canvas, views::View* view) const override {
     const int kGridSizeForPainter = 9;
     const int kImages[kNumOrientations][kNumStates][kGridSizeForPainter] = {
       { // Horizontal
         IMAGE_GRID_HORIZONTAL(IDR_AURA_TRAY_BG_HORIZ),
         IMAGE_GRID_HORIZONTAL(IDR_AURA_TRAY_BG_HORIZ_ONBLACK),
         IMAGE_GRID_HORIZONTAL(IDR_AURA_TRAY_BG_HORIZ_PRESSED),
@@ skipping 465 matching lines @@
     background_->set_alpha(kTrayBackgroundAlpha);
   SchedulePaint();
 }
 
 void TrayBackgroundView::UpdateBubbleViewArrow(
     views::TrayBubbleView* bubble_view) {
   // Nothing to do here.
 }
 
 }  // namespace ash