[PresentationAPI] on-session-message handler for ArrayBuffer and Blob messages.

content/renderer/presentation/presentation_dispatcher.cc

 // 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.
 
 #include "content/renderer/presentation/presentation_dispatcher.h"
 
 #include <algorithm>
 #include <vector>
 
 #include "base/logging.h"
@@ skipping 357 matching lines @@
       GetWebPresentationSessionStateFromMojo(session_state));
 }
 
 void PresentationDispatcher::OnSessionMessagesReceived(
     mojo::Array<presentation::SessionMessagePtr> messages) {
   // When messages is null, there is an error at presentation service side.
   if (!controller_ || messages.is_null())
     return;
 
   for (size_t i = 0; i < messages.size(); ++i) {
-    if (messages[i]->type ==
-        presentation::PresentationMessageType::PRESENTATION_MESSAGE_TYPE_TEXT) {
-      controller_->didReceiveSessionTextMessage(
-          new PresentationSessionClient(messages[i]->presentation_url,
-                                        messages[i]->presentation_id),
-          blink::WebString::fromUTF8(messages[i]->message));
-    } else {
-      // TODO(haibinlu): handle binary message
+    // Note: Passing batches of messages to the Blink layer would be more
+    // efficient.
+    scoped_ptr<PresentationSessionClient> session_client(
+        new PresentationSessionClient(messages[i]->presentation_url,
+                                      messages[i]->presentation_id));
+    switch (messages[i]->type) {
+      case presentation::PresentationMessageType::
+          PRESENTATION_MESSAGE_TYPE_TEXT: {
+        controller_->didReceiveSessionTextMessage(
+            session_client.release(),
+            blink::WebString::fromUTF8(messages[i]->message));
+        break;
+      }
+      case presentation::PresentationMessageType::
+          PRESENTATION_MESSAGE_TYPE_ARRAY_BUFFER:
+      case presentation::PresentationMessageType::
+          PRESENTATION_MESSAGE_TYPE_BLOB: {
+        controller_->didReceiveSessionBinaryMessage(
+            session_client.release(), &(messages[i]->data.front()),
+            messages[i]->data.size());
+        break;
+      }
+      default: {
+        NOTREACHED();
+        break;
+      }
     }
   }
 
   presentation_service_->ListenForSessionMessages(
       base::Bind(&PresentationDispatcher::OnSessionMessagesReceived,
                  base::Unretained(this)));
 }
 
 void PresentationDispatcher::ConnectToPresentationServiceIfNeeded() {
   if (presentation_service_.get())
@@ skipping 10 matching lines @@
       base::Unretained(this)));
 
   // TODO(imcheng): Uncomment this once it is implemented on the browser
   // side. (crbug.com/459006)
   // presentation_service_->ListenForSessionStateChange(base::Bind(
   //     &PresentationDispatcher::OnSessionStateChange,
   //     base::Unretained(this)));
 }
 
 }  // namespace content