More work to make ash_unittests pass when we require context.

ash/drag_drop/drag_image_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/drag_drop/drag_image_view.h"
 
 #include "skia/ext/image_operations.h"
 #include "ui/aura/window.h"
 #include "ui/compositor/dip_util.h"
 #include "ui/gfx/canvas.h"
 #include "ui/gfx/size_conversions.h"
 #include "ui/views/corewm/shadow_types.h"
 #include "ui/views/widget/widget.h"
 
 namespace ash {
 namespace internal {
 
 namespace {
 using views::Widget;
 
-Widget* CreateDragWidget() {
+Widget* CreateDragWidget(gfx::NativeView context) {
   Widget* drag_widget = new Widget;
   Widget::InitParams params;
   params.type = Widget::InitParams::TYPE_TOOLTIP;
   params.keep_on_top = true;
+  params.context = context;
   params.accept_events = false;
   params.ownership = Widget::InitParams::WIDGET_OWNS_NATIVE_WIDGET;
   params.transparent = true;
   drag_widget->Init(params);
   drag_widget->SetOpacity(0xFF);
   drag_widget->GetNativeWindow()->set_owned_by_parent(false);
   SetShadowType(drag_widget->GetNativeView(), views::corewm::SHADOW_TYPE_NONE);
   return drag_widget;
 }
 }
 
-DragImageView::DragImageView() : views::ImageView() {
-  widget_.reset(CreateDragWidget());
+DragImageView::DragImageView(gfx::NativeView context) : views::ImageView() {
+  widget_.reset(CreateDragWidget(context));
   widget_->SetContentsView(this);
   widget_->SetAlwaysOnTop(true);
 
   // We are owned by the DragDropController.
   set_owned_by_client();
 }
 
 DragImageView::~DragImageView() {
   widget_->Hide();
 }
@@ skipping 43 matching lines @@
     SkBitmap scaled = skia::ImageOperations::Resize(
         image_rep.sk_bitmap(), skia::ImageOperations::RESIZE_LANCZOS3,
         scaled_widget_size.width(), scaled_widget_size.height());
     gfx::ImageSkia image_skia(gfx::ImageSkiaRep(scaled, device_scale_factor));
     canvas->DrawImageInt(image_skia, 0, 0);
   }
 }
 
 }  // namespace internal
 }  // namespace ash