[PresentationAPI] Plumbing send() from PresentationSession IDL to platform/.

public/platform/modules/presentation/WebPresentationClient.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 WebPresentationClient_h
 #define WebPresentationClient_h
 
 #include "public/platform/WebCallbacks.h"
 #include "public/platform/WebCommon.h"
 
@@ skipping 22 matching lines @@
     virtual void updateAvailableChangeWatched(bool watched) = 0;
 
     // Called when the frame requests to start a new session.
     // The ownership of the |callbacks| argument is transferred to the embedder.
     virtual void startSession(const WebString& presentationUrl, const WebString& presentationId, WebPresentationSessionClientCallbacks*) = 0;
 
     // Called when the frame requests to join an existing session.
     // The ownership of the |callbacks| argument is transferred to the embedder.
     virtual void joinSession(const WebString& presentationUrl, const WebString& presentationId, WebPresentationSessionClientCallbacks*) = 0;
 
+    // Called when the frame requests to post DOMString message to an existing presentation.
+    virtual void postMessage(const WebString& url, const WebString& presentationId, const WebString& message) = 0;

[Peter Beverloo, 2015/03/25 20:20:29]

This won't compile because the postMessage() method does not yet exist in
//content's PresentationDispatcher. You'll need to define an empty method
inline. (void ..() {})

[whywhat, 2015/03/26 00:19:22]

I think it might work actually if Chromium change is submitted (since there's no
override used in the implementation of the interface by Blink tradition). Am I
right?

[USE s.singapati at gmail.com, 2015/03/26 11:57:40]

Done. Added empty definition for now and will be cleaned-up after Chromium patch
is landed.

+
     // Called when the frame requests to close an existing session.
     virtual void closeSession(const WebString& url, const WebString& presentationId) = 0;
 };
 
 } // namespace blink
 
 #endif // WebPresentationClient_h