Add [WillBeGarbageCollected] to Event.idl

Source/modules/mediastream/RTCDataChannelEvent.cpp

Index: Source/modules/mediastream/RTCDataChannelEvent.cpp
diff --git a/Source/modules/mediastream/RTCDataChannelEvent.cpp b/Source/modules/mediastream/RTCDataChannelEvent.cpp
index 470b27b082112a92b913d672bfb21466d0fda368..e6b4f58efb3706537ebdb110798d5014280d7b5f 100644
--- a/Source/modules/mediastream/RTCDataChannelEvent.cpp
+++ b/Source/modules/mediastream/RTCDataChannelEvent.cpp
@@ -27,14 +27,14 @@
 
 namespace WebCore {
 
-PassRefPtr<RTCDataChannelEvent> RTCDataChannelEvent::create()
+PassRefPtrWillBeRawPtr<RTCDataChannelEvent> RTCDataChannelEvent::create()
 {
-    return adoptRef(new RTCDataChannelEvent);
+    return adoptRefWillBeRefCountedGarbageCollected(new RTCDataChannelEvent);
 }
 
-PassRefPtr<RTCDataChannelEvent> RTCDataChannelEvent::create(const AtomicString& type, bool canBubble, bool cancelable, PassRefPtr<RTCDataChannel> channel)
+PassRefPtrWillBeRawPtr<RTCDataChannelEvent> RTCDataChannelEvent::create(const AtomicString& type, bool canBubble, bool cancelable, PassRefPtr<RTCDataChannel> channel)
 {
-    return adoptRef(new RTCDataChannelEvent(type, canBubble, cancelable, channel));
+    return adoptRefWillBeRefCountedGarbageCollected(new RTCDataChannelEvent(type, canBubble, cancelable, channel));
 }