chromeos: converts DragImageViewTest to AshTestBase

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 <memory>
 
 #include "ash/ash_constants.h"
@@ skipping 498 matching lines @@
   return this;
 }
 
 void ShelfView::CreateDragIconProxy(
     const gfx::Point& location_in_screen_coordinates,
     const gfx::ImageSkia& icon,
     views::View* replaced_view,
     const gfx::Vector2d& cursor_offset_from_center,
     float scale_factor) {
   drag_replaced_view_ = replaced_view;
-  WmWindow* root_window =
-      WmWindow::Get(drag_replaced_view_->GetWidget()->GetNativeWindow())
-          ->GetRootWindow();
-  drag_image_.reset(new DragImageView(
-      root_window, ui::DragDropTypes::DRAG_EVENT_SOURCE_MOUSE));
+  aura::Window* root_window =
+      drag_replaced_view_->GetWidget()->GetNativeWindow()->GetRootWindow();
+  drag_image_ = base::MakeUnique<DragImageView>(
+      root_window, ui::DragDropTypes::DRAG_EVENT_SOURCE_MOUSE);
   drag_image_->SetImage(icon);
   gfx::Size size = drag_image_->GetPreferredSize();
   size.set_width(size.width() * scale_factor);
   size.set_height(size.height() * scale_factor);
   drag_image_offset_ = gfx::Vector2d(size.width() / 2, size.height() / 2) +
                        cursor_offset_from_center;
   gfx::Rect drag_image_bounds(
       location_in_screen_coordinates - drag_image_offset_, size);
   drag_image_->SetBoundsInScreen(drag_image_bounds);
   drag_image_->SetWidgetVisible(true);
@@ skipping 1228 matching lines @@
 
 int ShelfView::CalculateShelfDistance(const gfx::Point& coordinate) const {
   const gfx::Rect bounds = GetBoundsInScreen();
   int distance = wm_shelf_->SelectValueForShelfAlignment(
       bounds.y() - coordinate.y(), coordinate.x() - bounds.right(),
       bounds.x() - coordinate.x());
   return distance > 0 ? distance : 0;
 }
 
 }  // namespace ash