[PresentationAPI] Implements send API for Blob data from WebPresentationClient

content/renderer/presentation/presentation_dispatcher.cc

Index: content/renderer/presentation/presentation_dispatcher.cc
diff --git a/content/renderer/presentation/presentation_dispatcher.cc b/content/renderer/presentation/presentation_dispatcher.cc
index 29f5047f0b57ec0639ff4d9765a2c645beb807f9..bee97c7d85bc19e465c5168bf19dc8f2b130b3e0 100644
--- a/content/renderer/presentation/presentation_dispatcher.cc
+++ b/content/renderer/presentation/presentation_dispatcher.cc
@@ -183,6 +183,35 @@ void PresentationDispatcher::sendArrayBuffer(
   }
 }
 
+void PresentationDispatcher::sendBlobData(
+    const blink::WebString& presentationUrl,
+    const blink::WebString& presentationId,
+    const uint8* data,
+    size_t length) {
+  DCHECK(data);

[imcheng (use chromium acct), 2015/05/18 18:24:48]

This code looks mostly identical to sendArrayBuffer above -- could it be
refactored to a helper method that can be invoked from both places?

[USE s.singapati at gmail.com, 2015/05/20 19:28:42]

Done. Added helper method that returns new SessionMessage.

+  if (length > kMaxPresentationSessionMessageSize) {
+    // TODO(crbug.com/459008): Same as in sendString().
+    LOG(WARNING) << "data size exceeded limit!";
+    return;
+  }
+
+  const std::vector<uint8> vector(data, data + length);
+  presentation::SessionMessage* session_message =
+      new presentation::SessionMessage();
+  session_message->presentation_url = presentationUrl.utf8();
+  session_message->presentation_id = presentationId.utf8();
+  session_message->type = presentation::PresentationMessageType::
+                          PRESENTATION_MESSAGE_TYPE_BLOB;
+  session_message->data = mojo::Array<uint8>::From(vector);
+
+  message_request_queue_.push(make_linked_ptr(session_message));
+  if (message_request_queue_.size() == 1) {
+    const linked_ptr<presentation::SessionMessage>& request =
+        message_request_queue_.front();
+    DoSendMessage(*request);
+  }
+}
+
 void PresentationDispatcher::DoSendMessage(
     const presentation::SessionMessage& session_message) {
   ConnectToPresentationServiceIfNeeded();
@@ -195,8 +224,8 @@ void PresentationDispatcher::DoSendMessage(
   if (session_message.type == presentation::PresentationMessageType::
                               PRESENTATION_MESSAGE_TYPE_TEXT) {
     message_request->message = session_message.message;
-  } else if (session_message.type == presentation::PresentationMessageType::
-                                      PRESENTATION_MESSAGE_TYPE_ARRAY_BUFFER) {
+  } else {
+    // ArrayBuffer or Blob types.
     message_request->data = mojo::Array<uint8>::From(
         session_message.data.storage());
   }