chromeos: converts DragImageViewTest to AshTestBase

ash/drag_drop/drag_drop_controller.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/drag_drop/drag_drop_controller.h"
 
 #include <utility>
 
 #include "ash/drag_drop/drag_drop_tracker.h"
 #include "ash/drag_drop/drag_image_view.h"
 #include "ash/shell.h"
 #include "ash/shell_port.h"
 #include "ash/wm_window.h"
 #include "base/bind.h"
+#include "base/memory/ptr_util.h"
 #include "base/message_loop/message_loop.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/run_loop.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "ui/aura/client/capture_client.h"
 #include "ui/aura/client/drag_drop_delegate.h"
 #include "ui/aura/env.h"
 #include "ui/aura/window.h"
 #include "ui/aura/window_delegate.h"
 #include "ui/aura/window_event_dispatcher.h"
@@ skipping 171 matching lines @@
   float drag_image_scale = 1;
   int drag_image_vertical_offset = 0;
   if (source == ui::DragDropTypes::DRAG_EVENT_SOURCE_TOUCH) {
     drag_image_scale = kTouchDragImageScale;
     drag_image_vertical_offset = kTouchDragImageVerticalOffset;
   }
   gfx::Point start_location = screen_location;
   drag_image_final_bounds_for_cancel_animation_ =
       gfx::Rect(start_location - provider->GetDragImageOffset(),
                 provider->GetDragImage().size());
-  drag_image_.reset(
-      new DragImageView(WmWindow::Get(source_window->GetRootWindow()), source));
+  drag_image_ =
+      base::MakeUnique<DragImageView>(source_window->GetRootWindow(), source);
   drag_image_->SetImage(provider->GetDragImage());
   drag_image_offset_ = provider->GetDragImageOffset();
   gfx::Rect drag_image_bounds(start_location, drag_image_->GetPreferredSize());
   drag_image_bounds = AdjustDragImageBoundsForScaleAndOffset(
       drag_image_bounds, drag_image_vertical_offset, drag_image_scale,
       &drag_image_offset_);
   drag_image_->SetBoundsInScreen(drag_image_bounds);
   drag_image_->SetWidgetVisible(true);
   if (source == ui::DragDropTypes::DRAG_EVENT_SOURCE_TOUCH) {
     drag_image_->SetTouchDragOperationHintPosition(
@@ skipping 356 matching lines @@
   if (drag_window_)
     drag_window_->RemoveObserver(this);
   drag_window_ = NULL;
   drag_data_ = NULL;
   // Cleanup can be called again while deleting DragDropTracker, so delete
   // the pointer with a local variable to avoid double free.
   std::unique_ptr<ash::DragDropTracker> holder = std::move(drag_drop_tracker_);
 }
 
 }  // namespace ash