Oilpan: Enable Oilpan by default in modules/encryptedmedia

Source/modules/encryptedmedia/MediaKeySession.h

Index: Source/modules/encryptedmedia/MediaKeySession.h
diff --git a/Source/modules/encryptedmedia/MediaKeySession.h b/Source/modules/encryptedmedia/MediaKeySession.h
index 8881515e22b94db9737b737c24d08bbec9d7589d..cfdc654516f56f6cec284d9f01c00b91f4f7eb80 100644
--- a/Source/modules/encryptedmedia/MediaKeySession.h
+++ b/Source/modules/encryptedmedia/MediaKeySession.h
@@ -64,11 +64,11 @@ class MediaKeys;
 // it may outlive any JavaScript references as long as the MediaKeys object is alive.
 // The WebContentDecryptionModuleSession has the same lifetime as this object.
 class MediaKeySession FINAL
-    : public RefCountedWillBeRefCountedGarbageCollected<MediaKeySession>, public ActiveDOMObject, public ScriptWrappable, public EventTargetWithInlineData
+    : public RefCountedGarbageCollected<MediaKeySession>, public ActiveDOMObject, public ScriptWrappable, public EventTargetWithInlineData
     , private blink::WebContentDecryptionModuleSession::Client {
-    DEFINE_EVENT_TARGET_REFCOUNTING(RefCountedWillBeRefCountedGarbageCollected<MediaKeySession>);
+    DEFINE_EVENT_TARGET_REFCOUNTING(RefCountedGarbageCollected<MediaKeySession>);
 public:
-    static PassRefPtrWillBeRawPtr<MediaKeySession> create(ExecutionContext*, blink::WebContentDecryptionModule*, WeakPtrWillBeRawPtr<MediaKeys>);
+    static MediaKeySession* create(ExecutionContext*, blink::WebContentDecryptionModule*, MediaKeys*);
     virtual ~MediaKeySession();
 
     const String& keySystem() const { return m_keySystem; }
@@ -111,7 +111,7 @@ private:
         PendingAction(Type, PassRefPtr<Uint8Array> data);
     };
 
-    MediaKeySession(ExecutionContext*, blink::WebContentDecryptionModule*, WeakPtrWillBeRawPtr<MediaKeys>);
+    MediaKeySession(ExecutionContext*, blink::WebContentDecryptionModule*, MediaKeys*);
     void actionTimerFired(Timer<MediaKeySession>*);
 
     // blink::WebContentDecryptionModuleSession::Client
@@ -126,7 +126,7 @@ private:
     OwnPtr<blink::WebContentDecryptionModuleSession> m_session;
 
     // Used to determine if MediaKeys is still active.
-    WeakPtrWillBeWeakMember<MediaKeys> m_keys;
+    WeakMember<MediaKeys> m_keys;
 
     // Is the CDM finished with this session?
     bool m_isClosed;