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

public/platform/modules/presentation/WebPresentationClient.h

Index: public/platform/modules/presentation/WebPresentationClient.h
diff --git a/public/platform/modules/presentation/WebPresentationClient.h b/public/platform/modules/presentation/WebPresentationClient.h
index ab82031d5e09e68366df0976027d33d106e6874b..ccc25f9046966f0486b47b9e8c021b2894b0d849 100644
--- a/public/platform/modules/presentation/WebPresentationClient.h
+++ b/public/platform/modules/presentation/WebPresentationClient.h
@@ -40,6 +40,9 @@ public:
     // 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;
 };