Oilpan: Enable Oilpan by default in modules/encryptedmedia

Source/modules/encryptedmedia/MediaKeySession.cpp

Index: Source/modules/encryptedmedia/MediaKeySession.cpp
diff --git a/Source/modules/encryptedmedia/MediaKeySession.cpp b/Source/modules/encryptedmedia/MediaKeySession.cpp
index f63412ae11f230c2fc35c30b3b5b73886b1c360e..28101cc1ba78be64fa61952a187fc2b58d656ec4 100644
--- a/Source/modules/encryptedmedia/MediaKeySession.cpp
+++ b/Source/modules/encryptedmedia/MediaKeySession.cpp
@@ -60,14 +60,14 @@ MediaKeySession::PendingAction::~PendingAction()
 {
 }
 
-PassRefPtrWillBeRawPtr<MediaKeySession> MediaKeySession::create(ExecutionContext* context, blink::WebContentDecryptionModule* cdm, WeakPtrWillBeRawPtr<MediaKeys> keys)
+MediaKeySession* MediaKeySession::create(ExecutionContext* context, blink::WebContentDecryptionModule* cdm, MediaKeys* keys)
 {
-    RefPtrWillBeRawPtr<MediaKeySession> session(adoptRefWillBeRefCountedGarbageCollected(new MediaKeySession(context, cdm, keys)));
+    MediaKeySession* session = adoptRefCountedGarbageCollected(new MediaKeySession(context, cdm, keys));
     session->suspendIfNeeded();
-    return session.release();
+    return session;
 }
 
-MediaKeySession::MediaKeySession(ExecutionContext* context, blink::WebContentDecryptionModule* cdm, WeakPtrWillBeRawPtr<MediaKeys> keys)
+MediaKeySession::MediaKeySession(ExecutionContext* context, blink::WebContentDecryptionModule* cdm, MediaKeys* keys)
     : ActiveDOMObject(context)
     , m_keySystem(keys->keySystem())
     , m_asyncEventQueue(GenericEventQueue::create(this))