[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..709d6b369b66e5af35eb015dc848e22d373d15a0 100644
--- a/content/renderer/presentation/presentation_dispatcher.cc
+++ b/content/renderer/presentation/presentation_dispatcher.cc
@@ -17,6 +17,8 @@
 #include "third_party/WebKit/public/web/WebLocalFrame.h"
 #include "url/gurl.h"
 
+using presentation::PresentationMessageType;
+
 namespace {
 
 blink::WebPresentationError::ErrorType GetWebPresentationErrorTypeFromMojo(
@@ -54,6 +56,22 @@ GURL GetPresentationURLFromFrame(content::RenderFrame* frame) {
   return url.is_valid() ? url : GURL();
 }
 
+presentation::SessionMessage* GetMojoSessionMessage(
+    const blink::WebString& presentationUrl,
+    const blink::WebString& presentationId,
+    PresentationMessageType type,
+    const uint8* data,
+    size_t length) {
+  presentation::SessionMessage* session_message =
+      new presentation::SessionMessage();
+  session_message->presentation_url = presentationUrl.utf8();
+  session_message->presentation_id = presentationId.utf8();
+  session_message->type = type;
+  const std::vector<uint8> vector(data, data + length);
+  session_message->data = mojo::Array<uint8>::From(vector);
+  return session_message;
+}
+
 }  // namespace
 
 namespace content {
@@ -140,8 +158,8 @@ void PresentationDispatcher::sendString(
       new presentation::SessionMessage();
   session_message->presentation_url = presentationUrl.utf8();
   session_message->presentation_id = presentationId.utf8();
-  session_message->type = presentation::PresentationMessageType::
-                          PRESENTATION_MESSAGE_TYPE_TEXT;
+  session_message->type =
+      PresentationMessageType::PRESENTATION_MESSAGE_TYPE_TEXT;
   session_message->message = message.utf8();
 
   message_request_queue_.push(make_linked_ptr(session_message));
@@ -165,15 +183,11 @@ void PresentationDispatcher::sendArrayBuffer(
     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_ARRAY_BUFFER;
-  session_message->data = mojo::Array<uint8>::From(vector);
-
+      GetMojoSessionMessage(presentationUrl, presentationId,
+                            PresentationMessageType::
+                                PRESENTATION_MESSAGE_TYPE_ARRAY_BUFFER,
+                            data, length);
   message_request_queue_.push(make_linked_ptr(session_message));
   // Start processing request if only one in the queue.
   if (message_request_queue_.size() == 1) {
@@ -183,22 +197,54 @@ void PresentationDispatcher::sendArrayBuffer(
   }
 }
 
+void PresentationDispatcher::sendBlobData(
+    const blink::WebString& presentationUrl,
+    const blink::WebString& presentationId,
+    const uint8* data,
+    size_t length) {
+  DCHECK(data);
+  if (length > kMaxPresentationSessionMessageSize) {
+    // TODO(crbug.com/459008): Same as in sendString().
+    LOG(WARNING) << "data size exceeded limit!";
+    return;
+  }
+
+  presentation::SessionMessage* session_message = GetMojoSessionMessage(
+      presentationUrl, presentationId,
+      PresentationMessageType::PRESENTATION_MESSAGE_TYPE_BLOB,
+      data, length);
+  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();
-
   presentation::SessionMessagePtr message_request(
       presentation::SessionMessage::New());
   message_request->presentation_url = session_message.presentation_url;
   message_request->presentation_id = session_message.presentation_id;
   message_request->type = session_message.type;
-  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) {
-    message_request->data = mojo::Array<uint8>::From(
-        session_message.data.storage());
+  switch (session_message.type) {
+    case PresentationMessageType::PRESENTATION_MESSAGE_TYPE_TEXT: {
+      message_request->message = session_message.message;
+      break;
+    }
+    case PresentationMessageType::PRESENTATION_MESSAGE_TYPE_ARRAY_BUFFER:
+    case PresentationMessageType::PRESENTATION_MESSAGE_TYPE_BLOB: {
+      message_request->data =
+          mojo::Array<uint8>::From(session_message.data.storage());
+      break;
+    }
+    default: {
+      NOTREACHED() << "Invalid presentation message type "
+                   << session_message.type;
+      break;
+    }
   }
 
   presentation_service_->SendSessionMessage(
@@ -323,7 +369,7 @@ void PresentationDispatcher::OnSessionMessagesReceived(
 
   for (size_t i = 0; i < messages.size(); ++i) {
     if (messages[i]->type ==
-        presentation::PresentationMessageType::PRESENTATION_MESSAGE_TYPE_TEXT) {
+        PresentationMessageType::PRESENTATION_MESSAGE_TYPE_TEXT) {
       controller_->didReceiveSessionTextMessage(
           new PresentationSessionClient(messages[i]->presentation_url,
                                         messages[i]->presentation_id),