Pass shelf instances, not root windows, for ash context menus.

ash/shelf/shelf_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/shelf/shelf_view.h"
 
 #include <algorithm>
 
 #include "ash/ash_constants.h"
 #include "ash/ash_switches.h"
@@ skipping 1780 matching lines @@
 void ShelfView::ShowContextMenuForView(views::View* source,
                                        const gfx::Point& point,
                                        ui::MenuSourceType source_type) {
   int view_index = view_model_->GetIndexOfView(source);
   if (view_index == -1) {
     Shell::GetInstance()->ShowContextMenu(point, source_type);
     return;
   }
 
   context_menu_model_.reset(Shell::GetInstance()->delegate()->CreateContextMenu(
-      source->GetWidget()->GetNativeView()->GetRootWindow(),
-      &model_->items()[view_index]));
+      shelf_, &model_->items()[view_index]));
   if (!context_menu_model_)
     return;
 
   base::AutoReset<ShelfID> reseter(
       &context_menu_id_,
       view_index == -1 ? 0 : model_->items()[view_index].id);
 
   ShowMenu(context_menu_model_.get(),
            source,
            point,
@@ skipping 146 matching lines @@
 
 int ShelfView::CalculateShelfDistance(const gfx::Point& coordinate) const {
   const gfx::Rect bounds = GetBoundsInScreen();
   int distance = shelf_->SelectValueForShelfAlignment(
       bounds.y() - coordinate.y(), coordinate.x() - bounds.right(),
       bounds.x() - coordinate.x(), coordinate.y() - bounds.bottom());
   return distance > 0 ? distance : 0;
 }
 
 }  // namespace ash