[PresentationAPI] Implements send API for Blob data from WebPresentationClient

content/public/browser/presentation_session_message.h

 // Copyright 2015 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 CONTENT_PUBLIC_BROWSER_PRESENTATION_SESSION_MESSAGE_H_
 #define CONTENT_PUBLIC_BROWSER_PRESENTATION_SESSION_MESSAGE_H_
 
 #include <string>
 #include <vector>
 
 #include "base/memory/scoped_ptr.h"
 #include "content/common/content_export.h"
 
 namespace content {
 
+enum CONTENT_EXPORT PresentationMessageType {
+  TEXT,
+  ARRAY_BUFFER,
+  BLOB,
+};
+
 // Represents a presentation session message.
 // If this is a text message, |data| is null; otherwise, |message| is null.
 // Empty messages are allowed.
 struct CONTENT_EXPORT PresentationSessionMessage {
  public:
   ~PresentationSessionMessage();
 
   // Creates string message, which takes the ownership of |message|.
   static scoped_ptr<PresentationSessionMessage> CreateStringMessage(
       const std::string& presentation_url,
       const std::string& presentation_id,
       scoped_ptr<std::string> message);
 
   // Creates binary message, which takes the ownership of |data|.
   static scoped_ptr<PresentationSessionMessage> CreateBinaryMessage(

[mark a. foltz, 2015/06/02 23:51:02]

Prefer explicit methods to parallel the above:

CreateArrayBufferMessage()
CreateBlobMessage()

[USE s.singapati at gmail.com, 2015/06/03 15:03:50]

Done.

       const std::string& presentation_url,
       const std::string& presentation_id,
-      scoped_ptr<std::vector<uint8_t>> data);
+      scoped_ptr<std::vector<uint8_t>> data,
+      PresentationMessageType type);
 
   bool is_binary() const;
   std::string presentation_url;
   std::string presentation_id;
   scoped_ptr<std::string> message;
   scoped_ptr<std::vector<uint8_t>> data;
+  PresentationMessageType type;
 
  private:
   PresentationSessionMessage(const std::string& presentation_url,
                              const std::string& presentation_id,
                              scoped_ptr<std::string> message);
   PresentationSessionMessage(const std::string& presentation_url,
                              const std::string& presentation_id,
-                             scoped_ptr<std::vector<uint8_t>> data);
+                             scoped_ptr<std::vector<uint8_t>> data,
+                             PresentationMessageType type);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_PRESENTATION_SESSION_H_