Remove the previous headers_stream_ and Change unowned_headers_stream_ to header_stream_.

The unique_ptr headers_stream is now only used as a temporary variable to pass into stream_map. No need to have it as a member variable anymore.

gfe-relnote: No behavior change. Not protected.
PiperOrigin-RevId: 258403361
Change-Id: Idefbab511707878e6904c58f0aaef7c4f205f710
diff --git a/quic/core/http/quic_spdy_session_test.cc b/quic/core/http/quic_spdy_session_test.cc
index 4b450e9..d76b846 100644
--- a/quic/core/http/quic_spdy_session_test.cc
+++ b/quic/core/http/quic_spdy_session_test.cc
@@ -928,9 +928,9 @@
   }
   TestHeadersStream* headers_stream;
 
-  QuicSpdySessionPeer::SetUnownedHeadersStream(&session_, nullptr);
+  QuicSpdySessionPeer::SetHeadersStream(&session_, nullptr);
   headers_stream = new TestHeadersStream(&session_);
-  QuicSpdySessionPeer::SetUnownedHeadersStream(&session_, headers_stream);
+  QuicSpdySessionPeer::SetHeadersStream(&session_, headers_stream);
   session_.MarkConnectionLevelWriteBlocked(
       QuicUtils::GetHeadersStreamId(connection_->transport_version()));
   EXPECT_CALL(*headers_stream, OnCanWrite());
@@ -1741,9 +1741,9 @@
 
 TEST_P(QuicSpdySessionTestClient, WritePriority) {
   TestHeadersStream* headers_stream;
-  QuicSpdySessionPeer::SetUnownedHeadersStream(&session_, nullptr);
+  QuicSpdySessionPeer::SetHeadersStream(&session_, nullptr);
   headers_stream = new TestHeadersStream(&session_);
-  QuicSpdySessionPeer::SetUnownedHeadersStream(&session_, headers_stream);
+  QuicSpdySessionPeer::SetHeadersStream(&session_, headers_stream);
 
   // Make packet writer blocked so |headers_stream| will buffer its write data.
   MockPacketWriter* writer = static_cast<MockPacketWriter*>(