NOT FOR LANDING Introduce and use WebMediaSession

Source/modules/mediasession/MediaSession.cpp

Index: Source/modules/mediasession/MediaSession.cpp
diff --git a/Source/modules/mediasession/MediaSession.cpp b/Source/modules/mediasession/MediaSession.cpp
index 937bf7f19d23f26aadf5c3f1ae0393ae0050d093..8b0445854697798e023501c6027dc34b990109f1 100644
--- a/Source/modules/mediasession/MediaSession.cpp
+++ b/Source/modules/mediasession/MediaSession.cpp
@@ -5,19 +5,52 @@
 #include "config.h"
 #include "modules/mediasession/MediaSession.h"
 
+#include "Source/bindings/core/v8/CallbackPromiseAdapter.h"
+#include "bindings/core/v8/ScriptState.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::create()
+MediaSession::MediaSession(PassOwnPtr<WebMediaSession> webMediaSession)
+    : m_webMediaSession(webMediaSession)
+{
+    ASSERT(m_webMediaSession);
+}
+
+MediaSession* MediaSession::create(ScriptState* scriptState)
 {
-    return new MediaSession;
+    LocalDOMWindow* domWindow = scriptState->domWindow();
+    LocalFrame* frame = domWindow->frame();
+    FrameLoaderClient* client = frame->loader().client();
+    return new MediaSession(client->createWebMediaSession());
 }
 
-void MediaSession::activate()
+MediaSession* MediaSession::createForTesting(PassOwnPtr<WebMediaSession> webMediaSession)
 {
+    return new MediaSession(webMediaSession);
 }
 
-void MediaSession::deactivate()
+ScriptPromise MediaSession::activate(ScriptState* scriptState)
 {
+    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, MediaSessionError>(resolver));
+
+    return promise;
 }
 
 } // namespace blink