Add [WillBeGarbageCollected] to Event.idl

Source/modules/device_orientation/DeviceOrientationEvent.h

Index: Source/modules/device_orientation/DeviceOrientationEvent.h
diff --git a/Source/modules/device_orientation/DeviceOrientationEvent.h b/Source/modules/device_orientation/DeviceOrientationEvent.h
index 243f5c220039e322c1fb41cfb94bc043028e0b2f..a7899350f971c0d480b17e5603719db533d0b1e0 100644
--- a/Source/modules/device_orientation/DeviceOrientationEvent.h
+++ b/Source/modules/device_orientation/DeviceOrientationEvent.h
@@ -36,13 +36,13 @@ class DeviceOrientationData;
 class DeviceOrientationEvent FINAL : public Event {
 public:
     virtual ~DeviceOrientationEvent();
-    static PassRefPtr<DeviceOrientationEvent> create()
+    static PassRefPtrWillBeRawPtr<DeviceOrientationEvent> create()
     {
-        return adoptRef(new DeviceOrientationEvent);
+        return adoptRefWillBeRefCountedGarbageCollected(new DeviceOrientationEvent);
     }
-    static PassRefPtr<DeviceOrientationEvent> create(const AtomicString& eventType, DeviceOrientationData* orientation)
+    static PassRefPtrWillBeRawPtr<DeviceOrientationEvent> create(const AtomicString& eventType, DeviceOrientationData* orientation)
     {
-        return adoptRef(new DeviceOrientationEvent(eventType, orientation));
+        return adoptRefWillBeRefCountedGarbageCollected(new DeviceOrientationEvent(eventType, orientation));
     }
 
     void initDeviceOrientationEvent(const AtomicString& type, bool bubbles, bool cancelable, DeviceOrientationData*);