Refactor: remove SetDisplayWorkAreaInsets calls.

ash/common/system/web_notification/ash_popup_alignment_delegate.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/system/web_notification/ash_popup_alignment_delegate.h"
 
 #include "ash/common/shelf/shelf_constants.h"
 #include "ash/common/shelf/shelf_types.h"
 #include "ash/common/shelf/wm_shelf.h"
 #include "ash/common/shell_window_ids.h"
@@ skipping 113 matching lines @@
 display::Display AshPopupAlignmentDelegate::GetCurrentDisplay() const {
   return shelf_->GetWindow()->GetDisplayNearestWindow();
 }
 
 void AshPopupAlignmentDelegate::UpdateWorkArea() {
   work_area_ = shelf_->GetUserWorkAreaBounds();
   DoUpdateIfPossible();
 }
 
 ///////////////////////////////////////////////////////////////////////////////
-// ShellObserver:
-
-void AshPopupAlignmentDelegate::OnDisplayWorkAreaInsetsChanged() {
-  UpdateWorkArea();
-}
-
-///////////////////////////////////////////////////////////////////////////////
 // WmShelfObserver:
 
 void AshPopupAlignmentDelegate::WillChangeVisibilityState(
     ShelfVisibilityState new_state) {
   UpdateWorkArea();
 }
 
 void AshPopupAlignmentDelegate::OnAutoHideStateChanged(
     ShelfAutoHideState new_state) {
   UpdateWorkArea();
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 // display::DisplayObserver:
 
 void AshPopupAlignmentDelegate::OnDisplayAdded(
     const display::Display& new_display) {}
 
 void AshPopupAlignmentDelegate::OnDisplayRemoved(
     const display::Display& old_display) {}
 
 void AshPopupAlignmentDelegate::OnDisplayMetricsChanged(
     const display::Display& display,
     uint32_t metrics) {
   if (GetCurrentDisplay().id() == display.id())
     UpdateWorkArea();
 }
 
 }  // namespace ash