Reduce SpdyHeaderBlock copies with move semantics.

net/quic/bidirectional_stream_quic_impl.cc

 // Copyright 2016 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/quic/bidirectional_stream_quic_impl.h"
 
+#include <utility>
+
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/logging.h"
 #include "base/timer/timer.h"
 #include "net/http/bidirectional_stream_request_info.h"
 #include "net/quic/quic_connection.h"
 #include "net/socket/next_proto.h"
 #include "net/spdy/spdy_header_block.h"
 #include "net/spdy/spdy_http_utils.h"
 
@@ skipping 72 matching lines @@
   SpdyHeaderBlock headers;
   HttpRequestInfo http_request_info;
   http_request_info.url = request_info_->url;
   http_request_info.method = request_info_->method;
   http_request_info.extra_headers = request_info_->extra_headers;
 
   CreateSpdyHeadersFromHttpRequest(http_request_info,
                                    http_request_info.extra_headers, HTTP2, true,
                                    &headers);
   size_t headers_bytes_sent = stream_->WriteHeaders(
-      headers, request_info_->end_stream_on_headers, nullptr);
+      std::move(headers), request_info_->end_stream_on_headers, nullptr);
   headers_bytes_sent_ += headers_bytes_sent;
   has_sent_headers_ = true;
 }
 
 int BidirectionalStreamQuicImpl::ReadData(IOBuffer* buffer, int buffer_len) {
   DCHECK(buffer);
   DCHECK(buffer_len);
 
   if (!stream_) {
     // If the stream is already closed, there is no body to read.
@@ skipping 236 matching lines @@
 void BidirectionalStreamQuicImpl::ResetStream() {
   if (!stream_)
     return;
   closed_stream_received_bytes_ = stream_->stream_bytes_read();
   closed_stream_sent_bytes_ = stream_->stream_bytes_written();
   stream_->SetDelegate(nullptr);
   stream_ = nullptr;
 }
 
 }  // namespace net