[PresentationAPI] Implementing send() from WebPresentationClient to the PresentationService.

content/public/browser/presentation_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_MESSAGE_H_
+#define CONTENT_PUBLIC_BROWSER_PRESENTATION_MESSAGE_H_
+
+#include <string>
+#include <vector>
+
+#include "content/common/content_export.h"
+
+namespace content {
+
+enum CONTENT_EXPORT PresentationMessageType {
+  TEXT,
+  ARRAY_BUFFER,
+};
+
+// Wrapper for text and binary message to be exchanged
+// between presentation sessions.
+struct CONTENT_EXPORT PresentationMessageRequest {
+  PresentationMessageRequest(
+      const std::string& presentation_url,
+      const std::string& presentation_id,
+      PresentationMessageType type,
+      const std::string& message,
+      const std::vector<uint8_t>& data);
+  ~PresentationMessageRequest();
+
+  const std::string presentation_url;
+  const std::string presentation_id;
+  PresentationMessageType type;
+  const std::string message;

[imcheng (use chromium acct), 2015/04/30 20:11:30]

Could you add some comments about this field being used for TEXT type only and
similarly for |data|?

[USE s.singapati at gmail.com, 2015/05/04 16:40:28]

Done.

+  const std::vector<uint8_t> data;
+};
+
+}  // namespace content
+
+#endif  // CONTENT_PUBLIC_BROWSER_PRESENTATION_MESSAGE_H_