Refactors DockedWindowLayoutManager in terms of ash/wm/common

ash/system/cast/tray_cast.cc

 // Copyright 2015 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/cast/tray_cast.h"
 
 #include "ash/session/session_state_delegate.h"
 #include "ash/shelf/shelf_types.h"
 #include "ash/shelf/shelf_util.h"
 #include "ash/shell.h"
@@ skipping 320 matching lines @@
 }
 
 // Exposes an icon in the tray. |TrayCast| manages the visiblity of this.
 class CastTrayView : public TrayItemView {
  public:
   explicit CastTrayView(SystemTrayItem* tray_item);
   ~CastTrayView() override;
 
   // Called when the tray alignment changes so that the icon can recenter
   // itself.
-  void UpdateAlignment(ShelfAlignment alignment);
+  void UpdateAlignment(wm::ShelfAlignment alignment);
 
  private:
   DISALLOW_COPY_AND_ASSIGN(CastTrayView);
 };
 
 CastTrayView::CastTrayView(SystemTrayItem* tray_item)
     : TrayItemView(tray_item) {
   CreateImageView();
 
   image_view()->SetImage(ui::ResourceBundle::GetSharedInstance()
                              .GetImageNamed(IDR_AURA_UBER_TRAY_SCREENSHARE)
                              .ToImageSkia());
 }
 
 CastTrayView::~CastTrayView() {
 }
 
-void CastTrayView::UpdateAlignment(ShelfAlignment alignment) {
+void CastTrayView::UpdateAlignment(wm::ShelfAlignment alignment) {
   // Center the item dependent on the orientation of the shelf.
   views::BoxLayout::Orientation layout = IsHorizontalAlignment(alignment)
                                              ? views::BoxLayout::kVertical
                                              : views::BoxLayout::kHorizontal;
   SetLayoutManager(new views::BoxLayout(layout, 0, 0, 0));
   Layout();
 }
 
 // This view displays a list of cast receivers that can be clicked on and casted
 // to. It is activated by clicking on the chevron inside of
@@ skipping 296 matching lines @@
     if (tray_)
       tray_->SetVisible(false);
   }
 }
 
 void TrayCast::OnCastingSessionStartedOrStopped(bool started) {
   is_casting_ = started;
   UpdatePrimaryView();
 }
 
-void TrayCast::UpdateAfterShelfAlignmentChange(ShelfAlignment alignment) {
+void TrayCast::UpdateAfterShelfAlignmentChange(wm::ShelfAlignment alignment) {
   if (tray_)
     tray_->UpdateAlignment(alignment);
 }
 
 }  // namespace ash