Support custom drag-and-drop of bookmarks in Aura

chrome/browser/tab_contents/web_drag_bookmark_handler_aura.h

+// 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.
+
+#ifndef CHROME_BROWSER_TAB_CONTENTS_WEB_DRAG_BOOKMARK_HANDLER_AURA_H_
+#define CHROME_BROWSER_TAB_CONTENTS_WEB_DRAG_BOOKMARK_HANDLER_AURA_H_
+#pragma once
+
+#include "content/public/browser/web_contents.h"
+#include "chrome/browser/bookmarks/bookmark_node_data.h"
+
+class TabContentsWrapper;
+
+// Chrome needs to intercept content drag events so it can dispatch them to the
+// bookmarks and extensions system.
+// Note that unlike the other platforms, Aura doesn't use the WebDragDest
+// infrastructure, so we don't implement WebDragDestDelegate here (although the
+// interface is really the same).
+class WebDragBookmarkHandlerAura {
+ public:
+  WebDragBookmarkHandlerAura();
+  virtual ~WebDragBookmarkHandlerAura();
+
+  void DragInitialize(content::WebContents* contents);
+  void OnDragOver();
+  void OnDragEnter(const ui::OSExchangeData& data);
+  void OnDrop();
+  void OnDragLeave();
+
+ private:
+  // The TabContentsWrapper for the drag.
+  // Weak reference; may be NULL if the contents aren't contained in a wrapper
+  // (e.g. WebUI dialogs).
+  TabContentsWrapper* tab_;
+
+  // The bookmark data for the active drag.  Empty when there is no active
+  // drag.
+  BookmarkNodeData bookmark_drag_data_;
+
+  DISALLOW_COPY_AND_ASSIGN(WebDragBookmarkHandlerAura);
+};
+
+#endif  // CHROME_BROWSER_TAB_CONTENTS_WEB_DRAG_BOOKMARK_HANDLER_AURA_H_