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

Source/modules/presentation/PresentationSession.h

 // Copyright 2014 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 PresentationSession_h
 #define PresentationSession_h
 
 #include "core/events/EventTarget.h"
 #include "core/frame/DOMWindowProperty.h"
 #include "public/platform/modules/presentation/WebPresentationSessionClient.h"
 #include "wtf/text/WTFString.h"
 
 namespace WTF {
 class AtomicString;
 } // namespace WTF
 
 namespace blink {
 
+class DOMArrayBuffer;
+class DOMArrayBufferView;
 class Presentation;
 class PresentationController;
 
 class PresentationSession final
     : public RefCountedGarbageCollectedEventTargetWithInlineData<PresentationSession>
     , public DOMWindowProperty {
     DEFINE_EVENT_TARGET_REFCOUNTING_WILL_BE_REMOVED(RefCountedGarbageCollected<PresentationSession>);
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(PresentationSession);
     DEFINE_WRAPPERTYPEINFO();
 public:
     static PresentationSession* take(WebPresentationSessionClient*, Presentation*);
     static void dispose(WebPresentationSessionClient*);
     virtual ~PresentationSession();
 
     // EventTarget implementation.
     virtual const AtomicString& interfaceName() const override;
     virtual ExecutionContext* executionContext() const override;
 
     DECLARE_VIRTUAL_TRACE();
 
     const String id() const { return m_id; }
     const WTF::AtomicString& state() const;
 
-    void postMessage(const String& message);
+    void send(const String& message, ExceptionState&);
+    void send(PassRefPtr<DOMArrayBuffer> data, ExceptionState&);
+    void send(PassRefPtr<DOMArrayBufferView> data, ExceptionState&);
     void close();
 
     DEFINE_ATTRIBUTE_EVENT_LISTENER(message);
     DEFINE_ATTRIBUTE_EVENT_LISTENER(statechange);
 
     // Returns true if and only if the WebPresentationSessionClient represents this session.
     bool matches(WebPresentationSessionClient*) const;
 
     // Notifies the session about its state change.
     void didChangeState(WebPresentationSessionState);
 
 private:
     PresentationSession(LocalFrame*, const String& id, const String& url);
 
     // Returns the |PresentationController| object associated with the frame
     // |Presentation| corresponds to. Can return |nullptr| if the frame is
     // detached from the document.
     PresentationController* presentationController();
 
+    // Common send method for both ArrayBufferView and ArrayBuffer.
+    void sendInternal(const uint8_t* data, size_t, ExceptionState&);
+
     String m_id;
     String m_url;
     WebPresentationSessionState m_state;
 };
 
 } // namespace blink
 
 #endif // PresentationSession_h