Add WebDragData to blink::WebView::dragtargetDrop

content/public/common/drop_data.h

Index: content/public/common/drop_data.h
diff --git a/content/public/common/drop_data.h b/content/public/common/drop_data.h
index fce6db13774f772181d135a12c452ff553f58699..8ea4b9a17009b2bc38abb6c0755fd62db7bd8303 100644
--- a/content/public/common/drop_data.h
+++ b/content/public/common/drop_data.h
@@ -32,6 +32,27 @@ struct CONTENT_EXPORT DropData {
     int64_t size;
   };
 
+  enum class Kind {
+    STRING = 0,
+    FILENAME,
+    FILESYSTEMFILE,
+    LAST = FILESYSTEMFILE
+  };
+
+  struct MetaData {
+    MetaData();
+    MetaData(DropData::Kind kind, base::string16 mime_type);

[dcheng, 2016/05/10 07:29:09]

const base::string16, here and below.

[hush (inactive), 2016/05/10 21:18:32]

Done. 

+    MetaData(DropData::Kind kind, base::FilePath filename);
+    MetaData(DropData::Kind kind, GURL file_system_url);
+    MetaData(const MetaData& other);
+    ~MetaData() {}

[dcheng, 2016/05/10 07:29:09]

I'm surprised that clang's complex destructor check isn't firing here.

[hush (inactive), 2016/05/10 21:18:32]

Clang may have just missed it.
I moved the destructor to cc file.

+
+    DropData::Kind kind;
+    base::string16 mime_type;
+    base::FilePath filename;
+    GURL file_system_url;
+  };
+
   DropData();
   DropData(const DropData& other);
   ~DropData();
@@ -54,6 +75,8 @@ struct CONTENT_EXPORT DropData {
   // populated if the drag is not renderer tainted, as this allows File access
   // from web content.
   std::vector<ui::FileInfo> filenames;
+  // The mime types of dragged files.
+  std::vector<base::string16> file_mime_types;
 
   // Isolated filesystem ID for the files being dragged on the webview.
   base::string16 filesystem_id;