Support accept attribute for an <input type=file> element....

chrome/common/render_messages_params.h

 // Copyright (c) 2010 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_COMMON_RENDER_MESSAGES_PARAMS_H_
 #define CHROME_COMMON_RENDER_MESSAGES_PARAMS_H_
 #pragma once
 
 #include <string>
 #include <vector>
@@ skipping 757 matching lines @@
   };
 
   Mode mode;
 
   // Title to be used for the dialog. This may be empty for the default title,
   // which will be either "Open" or "Save" depending on the mode.
   string16 title;
 
   // Default file name to select in the dialog.
   FilePath default_file_name;
+
+  // A comma-separated MIME types such as "audio/*,text/plain", that is used
+  // to restrict selectable files to such types.
+  string16 accept_types;
 };
 
 struct ViewMsg_ExtensionRendererInfo {
   std::string id;
   ExtensionExtent web_extent;
   std::string name;
   GURL icon_url;
   Extension::Location location;
 };
 
@@ skipping 336 matching lines @@
 struct ParamTraits<ViewMsg_FileSystem_DidReadDirectory_Params::Entry> {
   typedef ViewMsg_FileSystem_DidReadDirectory_Params::Entry param_type;
   static void Write(Message* m, const param_type& p);
   static bool Read(const Message* m, void** iter, param_type* p);
   static void Log(const param_type& p, std::string* l);
 };
 
 }  // namespace IPC
 
 #endif  // CHROME_COMMON_RENDER_MESSAGES_PARAMS_H_