Avoid SpdyHeaderBlock copy in SpdyStream::OnPushPromiseHeadersReceived().

net/spdy/spdy_stream_unittest.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "net/spdy/spdy_stream.h"
 
 #include <stdint.h>
 
 #include <cstddef>
 #include <limits>
@@ skipping 275 matching lines @@
                                            BoundNetLog(), CompletionCallback());
   ASSERT_THAT(result, IsOk());
   base::WeakPtr<SpdyStream> stream = stream_request.ReleaseStream();
   ActivatePushStream(spdy_session.get(), stream.get());
 
   EXPECT_TRUE(stream->GetUrlFromHeaders().is_empty());
 
   // Set required request headers.
   SpdyHeaderBlock request_headers;
   spdy_util_.AddUrlToHeaderBlock(kStreamUrl, &request_headers);
-  stream->OnPushPromiseHeadersReceived(request_headers);
+  stream->OnPushPromiseHeadersReceived(std::move(request_headers));
 
   base::Time response_time = base::Time::Now();
   base::TimeTicks first_byte_time = base::TimeTicks::Now();
   // Send some basic response headers.
   SpdyHeaderBlock response;
   response[spdy_util_.GetStatusKey()] = "200";
   stream->OnInitialResponseHeadersReceived(response, response_time,
                                            first_byte_time);
 
   // And some more headers.
@@ skipping 780 matching lines @@
   EXPECT_EQ(response_len, stream->raw_received_bytes());
 
   // FIN
   data.Resume();
   EXPECT_THAT(delegate.WaitForClose(), IsError(ERR_CONNECTION_CLOSED));
 }
 
 }  // namespace test
 
 }  // namespace net