Avoid SpdyHeaderBlock copy in SpdyStream::OnPushPromiseHeadersReceived().

net/spdy/spdy_test_util_common.cc

 // Copyright (c) 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_test_util_common.h"
 
 #include <stdint.h>
 
 #include <cstddef>
 #include <utility>
@@ skipping 176 matching lines @@
 
   void OnError(SpdyFramer::SpdyError error_code) override {}
   void OnStreamError(SpdyStreamId stream_id,
                      const std::string& description) override {}
   void OnHeaders(SpdyStreamId stream_id,
                  bool has_priority,
                  int weight,
                  SpdyStreamId parent_stream_id,
                  bool exclusive,
                  bool fin,
-                 const SpdyHeaderBlock& headers) override {
+                 SpdyHeaderBlock headers) override {
     if (has_priority) {
       priority_ = Http2WeightToSpdy3Priority(weight);
     }
   }
   void OnDataFrameHeader(SpdyStreamId stream_id,
                          size_t length,
                          bool fin) override {}
   void OnStreamFrameData(SpdyStreamId stream_id,
                          const char* data,
                          size_t len) override {}
   void OnStreamEnd(SpdyStreamId stream_id) override {}
   void OnStreamPadding(SpdyStreamId stream_id, size_t len) override {}
   void OnSettings(bool clear_persisted) override {}
   void OnSetting(SpdySettingsIds id, uint8_t flags, uint32_t value) override {}
   void OnPing(SpdyPingId unique_id, bool is_ack) override {}
   void OnRstStream(SpdyStreamId stream_id,
                    SpdyRstStreamStatus status) override {}
   void OnGoAway(SpdyStreamId last_accepted_stream_id,
                 SpdyGoAwayStatus status,
                 base::StringPiece debug_data) override {}
   void OnWindowUpdate(SpdyStreamId stream_id, int delta_window_size) override {}
   void OnPushPromise(SpdyStreamId stream_id,
                      SpdyStreamId promised_stream_id,
-                     const SpdyHeaderBlock& headers) override {}
+                     SpdyHeaderBlock headers) override {}
   void OnAltSvc(SpdyStreamId stream_id,
                 base::StringPiece origin,
                 const SpdyAltSvcWireFormat::AlternativeServiceVector&
                     altsvc_vector) override {}
   bool OnUnknownFrame(SpdyStreamId stream_id, int frame_type) override {
     return false;
   }
 
  private:
   SpdyPriority priority_;
@@ skipping 868 matching lines @@
   }
   return headers;
 }
 
 void SpdyTestUtil::SetPriority(RequestPriority priority,
                                SpdySynStreamIR* ir) const {
   ir->set_priority(ConvertRequestPriorityToSpdyPriority(priority));
 }
 
 }  // namespace net