Fix a test failure

transport/src/test/java/io/netty/channel/DefaultChannelPipelineTest.java

@@ -16,6 +16,7 @@
 package io.netty.channel;
 
 import static org.junit.Assert.*;
+import io.netty.channel.ChannelHandler.Sharable;
 import io.netty.channel.local.LocalChannel;
 
 import org.junit.Test;
@@ -47,7 +48,11 @@ public class DefaultChannelPipelineTest {
     }
 
     private static ChannelHandler newHandler() {
-        return new ChannelHandlerAdapter<Byte, Byte>() {
+        return new TestHandler();
+    }
+
+    @Sharable
+    private static class TestHandler extends ChannelHandlerAdapter<Byte, Byte> {
         @Override
         public ChannelBufferHolder<Byte> newInboundBuffer(
                 ChannelInboundHandlerContext<Byte> ctx) throws Exception {
@@ -60,5 +65,4 @@ public class DefaultChannelPipelineTest {
             return ChannelBufferHolders.byteBuffer();
         }
     };
-    }
 }