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

content/common/presentation/presentation_service.mojom

Index: content/common/presentation/presentation_service.mojom
diff --git a/content/common/presentation/presentation_service.mojom b/content/common/presentation/presentation_service.mojom
index 36756e23a080698ec63f93627b099bba23d9750e..42d2862f4de770122673c5a35374dea063eebdc2 100644
--- a/content/common/presentation/presentation_service.mojom
+++ b/content/common/presentation/presentation_service.mojom
@@ -26,6 +26,19 @@ struct PresentationError {
     string message;
 };
 
+enum PresentationMessageType {
+    TEXT,
+    ARRAY_BUFFER,
+};
+
+struct MessageRequest {

[haibinlu, 2015/04/24 22:13:25]

can this be renamed to SessionMessage so that on-message can use it too?

[USE s.singapati at gmail.com, 2015/04/27 19:28:56]

Yes, planning to rename this. SessionMessage would be better naming in mojom.h

And may be struct "PresentationSessionMessage" in content module?

+    string presentation_url;
+    string presentation_id;
+    PresentationMessageType type;
+    string message;
+    array<uint8> data;
+};
+
 interface PresentationService {
     // Called when the frame sets or changes the default presentation URL or
     // presentation ID.
@@ -74,6 +87,10 @@ interface PresentationService {
     JoinSession(string presentation_url, string? presentation_id)
         => (PresentationSessionInfo? sessionInfo, PresentationError? error);
 
+    // Called when send() is called by the frame. The result callback is
+    // to get notified that message has been received and ready for next one.
+    SendMessage(MessageRequest message_request) => ();
+
     // Called when closeSession() is called by the frame.
     CloseSession(string presentation_url, string presentation_id);