Revert of Introduce WebMediaSession

third_party/WebKit/Source/modules/mediasession/MediaSession.cpp

 // 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.
 
 #include "config.h"
 #include "modules/mediasession/MediaSession.h"
 
-#include "bindings/core/v8/CallbackPromiseAdapter.h"
-#include "bindings/core/v8/ScriptPromiseResolver.h"
-#include "bindings/core/v8/ScriptState.h"
-#include "core/dom/DOMException.h"
-#include "core/dom/ExceptionCode.h"
-#include "core/frame/LocalDOMWindow.h"
-#include "core/frame/LocalFrame.h"
-#include "core/loader/FrameLoaderClient.h"
-#include "modules/mediasession/MediaSessionError.h"
-
 namespace blink {
 
-MediaSession::MediaSession(PassOwnPtr<WebMediaSession> webMediaSession)
-    : m_webMediaSession(webMediaSession)
+MediaSession* MediaSession::create()
 {
-    ASSERT(m_webMediaSession);
+    return new MediaSession;
 }
 
-MediaSession* MediaSession::create(ExecutionContext* context, ExceptionState& exceptionState)
+void MediaSession::activate()
 {
-    Document* document = toDocument(context);
-    LocalFrame* frame = document->frame();
-    FrameLoaderClient* client = frame->loader().client();
-    OwnPtr<WebMediaSession> webMediaSession = client->createWebMediaSession();
-    if (!webMediaSession) {
-        exceptionState.throwDOMException(NotSupportedError, "Missing platform implementation.");
-        return nullptr;
-    }
-    return new MediaSession(webMediaSession.release());
 }
 
-ScriptPromise MediaSession::activate(ScriptState* scriptState)
+void MediaSession::deactivate()
 {
-    ScriptPromiseResolver* resolver = ScriptPromiseResolver::create(scriptState);
-    ScriptPromise promise = resolver->promise();
-
-    m_webMediaSession->activate(new CallbackPromiseAdapter<void, MediaSessionError>(resolver));
-    return promise;
-}
-
-ScriptPromise MediaSession::deactivate(ScriptState* scriptState)
-{
-    ScriptPromiseResolver* resolver = ScriptPromiseResolver::create(scriptState);
-    ScriptPromise promise = resolver->promise();
-
-    m_webMediaSession->deactivate(new CallbackPromiseAdapter<void, void>(resolver));
-    return promise;
 }
 
 } // namespace blink