Add WebDragData to blink::WebView::dragtargetDrop

content/public/common/drop_data.h

 // Copyright 2013 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.
 
 // A struct for managing data being dropped on a WebContents.  This represents
 // a union of all the types of data that can be dropped in a platform neutral
 // way.
 
 #ifndef CONTENT_PUBLIC_COMMON_DROP_DATA_H_
 #define CONTENT_PUBLIC_COMMON_DROP_DATA_H_
@@ skipping 20 matching lines @@
     GURL url;
     int64_t size;
   };
 
   DropData();
   ~DropData();
 
   // Whether this drag originated from a renderer.
   bool did_originate_from_renderer;
 
+  // Wether this DropData is valid.

[aelias_OOO_until_Jul13, 2016/03/02 02:53:40]

"Whether this DropData has been initialized" might be more informational.

+  bool is_valid;
+
   // User is dragging a link into the webview.
   GURL url;
   base::string16 url_title;  // The title associated with |url|.
 
   // User is dragging a link out-of the webview.
   base::string16 download_metadata;
 
   // Referrer policy to use when dragging a link out of the webview results in
   // a download.
   blink::WebReferrerPolicy referrer_policy;
@@ skipping 21 matching lines @@
   // User is dragging data from the webview (e.g., an image).
   base::string16 file_description_filename;
   std::string file_contents;
 
   std::map<base::string16, base::string16> custom_data;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_COMMON_DROP_DATA_H_