Standardize usage of virtual/override/final in net/

net/websockets/websocket_handshake_stream_base.h

Index: net/websockets/websocket_handshake_stream_base.h
diff --git a/net/websockets/websocket_handshake_stream_base.h b/net/websockets/websocket_handshake_stream_base.h
index 8208c0e742f9776e74ab4514cc2bd7504adcc6c4..6ad0f6b8b9e98e13cf7a59774c2018dc26a534a0 100644
--- a/net/websockets/websocket_handshake_stream_base.h
+++ b/net/websockets/websocket_handshake_stream_base.h
@@ -40,7 +40,7 @@ class NET_EXPORT WebSocketHandshakeStreamBase : public HttpStreamBase {
     // URLRequest::SetUserData().
     static const void* DataKey() { return kWebSocketHandshakeUserDataKey; }
 
-    virtual ~CreateHelper() {}
+    ~CreateHelper() override {}
 
     // Create a WebSocketBasicHandshakeStream. This is called after the
     // underlying connection has been established but before any handshake data
@@ -58,7 +58,7 @@ class NET_EXPORT WebSocketHandshakeStreamBase : public HttpStreamBase {
 
   // This has to have an inline implementation so that the net/url_request/
   // tests do not fail on iOS.
-  virtual ~WebSocketHandshakeStreamBase() {}
+  ~WebSocketHandshakeStreamBase() override {}
 
   // After the handshake has completed, this method creates a WebSocketStream
   // (of the appropriate type) from the WebSocketHandshakeStreamBase object.