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

Source/modules/presentation/PresentationSession.cpp

Index: Source/modules/presentation/PresentationSession.cpp
diff --git a/Source/modules/presentation/PresentationSession.cpp b/Source/modules/presentation/PresentationSession.cpp
index 47ba6253b3d33c471419808f6e6918b48f272bdd..821f1b41b0c0ff326021f18edff0eadcf98b061b 100644
--- a/Source/modules/presentation/PresentationSession.cpp
+++ b/Source/modules/presentation/PresentationSession.cpp
@@ -5,7 +5,10 @@
 #include "config.h"
 #include "modules/presentation/PresentationSession.h"
 
+#include "core/dom/DOMArrayBuffer.h"
+#include "core/dom/DOMArrayBufferView.h"
 #include "core/dom/Document.h"
+#include "core/dom/ExceptionCode.h"
 #include "core/events/Event.h"
 #include "core/frame/LocalFrame.h"
 #include "modules/EventTargetModules.h"
@@ -36,6 +39,11 @@ const AtomicString& SessionStateToString(WebPresentationSessionState state)
     return disconnectedValue;
 }
 
+void throwInvalidStateError(ExceptionState& exceptionState)

[whywhat, 2015/03/26 00:14:19]

Rename to something reflecting what kind of error it represents (e.g.
throwPresentationDisconnectedError() ) ?

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

Done.

+{
+    exceptionState.throwDOMException(InvalidStateError, "Presentation session is disconnected.");
+}
+
 } // namespace
 
 PresentationSession::PresentationSession(LocalFrame* frame, const String& id, const String& url)
@@ -90,7 +98,26 @@ const AtomicString& PresentationSession::state() const
     return SessionStateToString(m_state);
 }
 
-void PresentationSession::postMessage(const String& message)
+void PresentationSession::postMessage(const String& message, ExceptionState& exceptionState)
+{
+    if (m_state != WebPresentationSessionState::Connected) {
+        throwInvalidStateError(exceptionState);
+        return;
+    }
+    PresentationController* controller = presentationController();
+    if (controller)
+        controller->postMessage(m_url, m_id, message);
+}
+
+void PresentationSession::postMessage(Blob* data, ExceptionState& exceptionState)
+{
+}
+
+void PresentationSession::postMessage(DOMArrayBuffer* data, ExceptionState& exceptionState)
+{

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

Why is it OK for these methods to be empty? Can we at least have TODOs?

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

Done. Added TODOs for now. I think blink side implementation can be done soon
for this.

+}
+
+void PresentationSession::postMessage(DOMArrayBufferView* data, ExceptionState& exceptionState)
 {
 }