Move most of ui/views/drag_utils to ui/base/dragdrop so it can be used outside of views. I tried to…

ui/views/button_drag_utils.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 "ui/views/button_drag_utils.h"
+
+#include "base/utf_string_conversions.h"
+#include "googleurl/src/gurl.h"
+#include "grit/ui_resources.h"
+#include "ui/base/dragdrop/drag_utils.h"
+#include "ui/base/dragdrop/os_exchange_data.h"
+#include "ui/base/resource/resource_bundle.h"
+#include "ui/gfx/canvas_skia.h"
+#include "ui/views/controls/button/text_button.h"
+
+namespace button_drag_utils {
+
+// Maximum width of the link drag image in pixels.
+static const int kLinkDragImageMaxWidth = 200;
+
+void SetURLAndDragImage(const GURL& url,
+                        const string16& title,
+                        const SkBitmap& icon,
+                        ui::OSExchangeData* data) {
+  DCHECK(url.is_valid() && data);
+
+  data->SetURL(url, title);
+
+  // Create a button to render the drag image for us.
+  views::TextButton button(NULL,
+                           title.empty() ? UTF8ToUTF16(url.spec()) : title);
+  button.set_max_width(kLinkDragImageMaxWidth);
+  if (icon.isNull()) {
+    button.SetIcon(*ResourceBundle::GetSharedInstance().GetBitmapNamed(
+                   IDR_DEFAULT_FAVICON));
+  } else {
+    button.SetIcon(icon);
+  }
+  gfx::Size prefsize = button.GetPreferredSize();
+  button.SetBounds(0, 0, prefsize.width(), prefsize.height());
+
+  // Render the image.
+  gfx::CanvasSkia canvas(prefsize, false);
+  button.PaintButton(&canvas, views::TextButton::PB_FOR_DRAG);
+  drag_utils::SetDragImageOnDataObject(canvas, prefsize,
+      gfx::Point(prefsize.width() / 2, prefsize.height() / 2), data);
+}
+
+}  // namespace button_drag_utils