Oilpan: Make WebSocketChannel GarbageCollectedFinalized

Source/modules/websockets/WebSocketChannel.h

Index: Source/modules/websockets/WebSocketChannel.h
diff --git a/Source/modules/websockets/WebSocketChannel.h b/Source/modules/websockets/WebSocketChannel.h
index 69d5f392ff77ab05492bc6b95f845b2c78ec28aa..d41e3c5e6d85f3a7e3e976f5b680930b54dcbb8f 100644
--- a/Source/modules/websockets/WebSocketChannel.h
+++ b/Source/modules/websockets/WebSocketChannel.h
@@ -45,10 +45,7 @@ class ExecutionContext;
 class KURL;
 class WebSocketChannelClient;
 
-// FIXME: WebSocketChannel needs to be RefCountedGarbageCollected to support manual ref/deref
-// in MainThreadWebSocketChannelImpl. We should change it to GarbageCollectedFinalized once
-// we remove MainThreadWebSocketChannelImpl.
-class MODULES_EXPORT WebSocketChannel : public RefCountedGarbageCollected<WebSocketChannel> {
+class MODULES_EXPORT WebSocketChannel : public GarbageCollectedFinalized<WebSocketChannel> {
     WTF_MAKE_NONCOPYABLE(WebSocketChannel);
 public:
     WebSocketChannel() { }