Oilpan: Replace most of RefPtrs for Event objects with oilpan's transition types

Source/modules/gamepad/NavigatorGamepad.cpp

Index: Source/modules/gamepad/NavigatorGamepad.cpp
diff --git a/Source/modules/gamepad/NavigatorGamepad.cpp b/Source/modules/gamepad/NavigatorGamepad.cpp
index 4060f0c61500df08d9d6bdbcae8ce9e6740f519d..49fede39e10479d320685e6a310023a0bb20fe50 100644
--- a/Source/modules/gamepad/NavigatorGamepad.cpp
+++ b/Source/modules/gamepad/NavigatorGamepad.cpp
@@ -149,7 +149,7 @@ void NavigatorGamepad::didConnectOrDisconnectGamepad(unsigned index, const blink
     m_gamepads->set(index, gamepad);
 
     const AtomicString& eventName = connected ? EventTypeNames::gamepadconnected : EventTypeNames::gamepaddisconnected;
-    RefPtr<GamepadEvent> event = GamepadEvent::create(eventName, false, true, gamepad.get());
+    RefPtrWillBeRawPtr<GamepadEvent> event = GamepadEvent::create(eventName, false, true, gamepad.get());
     window()->dispatchEvent(event);
 }
 
@@ -197,7 +197,7 @@ bool NavigatorGamepad::hasLastData()
     return false;
 }
 
-PassRefPtr<Event> NavigatorGamepad::getLastEvent()
+PassRefPtrWillBeRawPtr<Event> NavigatorGamepad::getLastEvent()
 {
     // This is called only when hasLastData() is true.
     ASSERT_NOT_REACHED();