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_
 
 #include <stdint.h>
 
 #include <map>
 #include <string>
+#include <utility>
 #include <vector>
 
 #include "base/strings/nullable_string16.h"
 #include "content/common/content_export.h"
 #include "third_party/WebKit/public/platform/WebReferrerPolicy.h"
 #include "ui/base/dragdrop/file_info.h"
 #include "url/gurl.h"
 
 namespace content {
 
+enum DropDataKind {

[dcheng, 2016/04/19 06:58:47]

enum class DropDataKind {
  STRING,
  FILENAME,
  FILESYSTEMFILE,
  LAST = FILESYSTEMFILE
};

[hush (inactive), 2016/05/06 02:25:25]

Done. And I put them under DropData class.

+  STRING_KIND = 0,
+  FILENAME_KIND,
+  FILESYSTEMFILE_KIND,
+  DROP_DATA_KIND_LAST = FILESYSTEMFILE_KIND
+};
+
+typedef std::pair<base::string16, DropDataKind> MimeTypeKindPair;

[dcheng, 2016/04/19 06:58:47]

Nit: using MimeTypeKindPair = ...

[hush (inactive), 2016/05/06 02:25:25]

I removed this because of the complication of file case on Android VS Aura.
Instead, I created a MetaData class under DropData.

+
 struct CONTENT_EXPORT DropData {
   struct FileSystemFileInfo {
     FileSystemFileInfo() : size(0) {}
     ~FileSystemFileInfo() {}
 
     GURL url;
     int64_t size;
   };
 
   DropData();
@@ skipping 37 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_