Pass value and use std::move instead of const reference for ack listeners.

net/tools/quic/quic_simple_server_stream_test.cc

Index: net/tools/quic/quic_simple_server_stream_test.cc
diff --git a/net/tools/quic/quic_simple_server_stream_test.cc b/net/tools/quic/quic_simple_server_stream_test.cc
index 19bda41f0e408906f96c888f90687e1e4ac80e7e..1e250373d2d2a7c377884bd6f59eae28f7e3d1e3 100644
--- a/net/tools/quic/quic_simple_server_stream_test.cc
+++ b/net/tools/quic/quic_simple_server_stream_test.cc
@@ -117,14 +117,13 @@ class MockQuicSimpleServerSession : public QuicSimpleServerSession {
                     const string& error_details,
                     ConnectionCloseSource source));
   MOCK_METHOD1(CreateIncomingDynamicStream, QuicSpdyStream*(QuicStreamId id));
-  MOCK_METHOD6(
-      WritevData,
-      QuicConsumedData(QuicStream* stream,
-                       QuicStreamId id,
-                       QuicIOVector data,
-                       QuicStreamOffset offset,
-                       bool fin,
-                       const scoped_refptr<QuicAckListenerInterface>&));
+  MOCK_METHOD6(WritevData,
+               QuicConsumedData(QuicStream* stream,
+                                QuicStreamId id,
+                                QuicIOVector data,
+                                QuicStreamOffset offset,
+                                bool fin,
+                                scoped_refptr<QuicAckListenerInterface>));
   MOCK_METHOD4(OnStreamHeaderList,
                void(QuicStreamId stream_id,
                     bool fin,
@@ -134,12 +133,12 @@ class MockQuicSimpleServerSession : public QuicSimpleServerSession {
                void(QuicStreamId stream_id, SpdyPriority priority));
   // Methods taking non-copyable types like SpdyHeaderBlock by value cannot be
   // mocked directly.
-  size_t WriteHeaders(QuicStreamId id,
-                      SpdyHeaderBlock headers,
-                      bool fin,
-                      SpdyPriority priority,
-                      const scoped_refptr<QuicAckListenerInterface>&
-                          ack_notifier_delegate) override {
+  size_t WriteHeaders(
+      QuicStreamId id,
+      SpdyHeaderBlock headers,
+      bool fin,
+      SpdyPriority priority,
+      scoped_refptr<QuicAckListenerInterface> ack_notifier_delegate) override {
     return WriteHeadersMock(id, headers, fin, priority, ack_notifier_delegate);
   }
   MOCK_METHOD5(WriteHeadersMock,