Fix HTML5 effectAllowed and dragEffect on Chrome Linux.

app/gtk_dnd_util.h

 // Copyright (c) 2009 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 APP_GTK_DND_UTIL_H_
 #define APP_GTK_DND_UTIL_H_
 
 #include <gtk/gtk.h>
 
 #include <vector>
 
 #include "base/string16.h"
+#include "third_party/WebKit/WebKit/chromium/public/WebDragOperation.h"
 
 class GURL;
 
 namespace gtk_dnd_util {
 
 // Registry of all internal int codes for drag and drop.
 enum {
   // Intra-application types.
   CHROME_TAB = 1 << 0,
   CHROME_BOOKMARK_ITEM = 1 << 1,
@@ skipping 47 matching lines @@
 // |url| and |title|. Returns true if the url/title were safely extracted
 // and the url is valid.
 bool ExtractNamedURL(GtkSelectionData* selection_data,
                      GURL* url,
                      string16* title);
 
 // Extracts data of type TEXT_URI_LIST from |selection_data| into |urls|.
 bool ExtractURIList(GtkSelectionData* selection_data,
                     std::vector<GURL>* urls);
 
+// Convenience method for converting between a web drag operation and the GDK
+// equivalent.
+GdkDragAction WebDragOpToGdkDragAction(WebKit::WebDragOperationsMask op);
+
 }  // namespace gtk_dnd_util
 
 #endif  // APP_GTK_DND_UTIL_H_