Separate out the Windows bookmark handling code out of the core drag & drop target class. This matc…

chrome/browser/tab_contents/web_drag_bookmark_handler_win.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_WIN_H_
+#define CHROME_BROWSER_TAB_CONTENTS_WEB_DRAG_BOOKMARK_HANDLER_WIN_H_
+#pragma once
+
+#include "base/compiler_specific.h"
+#include "chrome/browser/bookmarks/bookmark_node_data.h"
+#include "content/browser/tab_contents/web_drag_dest_delegate.h"
+
+class TabContentsWrapper;
+
+// Chrome needs to intercept content drag events so it can dispatch them to the
+// bookmarks and extensions system.
+class WebDragBookmarkHandlerWin : public content::WebDragDestDelegate {
+ public:
+  WebDragBookmarkHandlerWin();
+  virtual ~WebDragBookmarkHandlerWin();
+
+  // Overridden from content::WebDragDestDelegate:
+  virtual void DragInitialize(content::WebContents* contents) OVERRIDE;
+  virtual void OnDragOver(IDataObject* data_object) OVERRIDE;
+  virtual void OnDragEnter(IDataObject* data_object) OVERRIDE;
+  virtual void OnDrop(IDataObject* data_object) OVERRIDE;
+  virtual void OnDragLeave(IDataObject* data_object) OVERRIDE;
+
+ private:
+  // The TabContentsWrapper for |tab_contents_|.
+  // Weak reference; may be NULL if the contents aren't contained in a wrapper
+  // (e.g. WebUI dialogs).
+  TabContentsWrapper* tab_;
+
+  DISALLOW_COPY_AND_ASSIGN(WebDragBookmarkHandlerWin);
+};
+
+#endif  // CHROME_BROWSER_TAB_CONTENTS_WEB_DRAG_BOOKMARK_HANDLER_WIN_H_