Optimize code in handling wrong HTTP/3 frames.

gfe-relnote: v99 only, not protected.
PiperOrigin-RevId: 264865143
Change-Id: I88fe384b8f51fd79446a0ec46392e81b845258c0

quic/core/http/quic_receive_control_stream.cc

diff --git a/quic/core/http/quic_receive_control_stream.cc b/quic/core/http/quic_receive_control_stream.cc
index 1808a92..0ff9e38 100644
--- a/quic/core/http/quic_receive_control_stream.cc
+++ b/quic/core/http/quic_receive_control_stream.cc
@@ -145,11 +145,11 @@
   }
 
  private:
-  void CloseConnectionOnWrongFrame(std::string frame_type) {
+  void CloseConnectionOnWrongFrame(QuicStringPiece frame_type) {
     // TODO(renjietang): Change to HTTP/3 error type.
     stream_->session()->connection()->CloseConnection(
         QUIC_HTTP_DECODER_ERROR,
-        frame_type + " frame received on control stream",
+        QuicStrCat(frame_type, " frame received on control stream"),
         ConnectionCloseBehavior::SEND_CONNECTION_CLOSE_PACKET);
   }
 

quic/core/http/quic_spdy_stream.cc

diff --git a/quic/core/http/quic_spdy_stream.cc b/quic/core/http/quic_spdy_stream.cc
index 464c0a3..dd7d424 100644
--- a/quic/core/http/quic_spdy_stream.cc
+++ b/quic/core/http/quic_spdy_stream.cc
@@ -164,9 +164,10 @@
   bool OnUnknownFrameEnd() override { return stream_->OnUnknownFrameEnd(); }
 
  private:
-  void CloseConnectionOnWrongFrame(std::string frame_type) {
+  void CloseConnectionOnWrongFrame(QuicStringPiece frame_type) {
     stream_->session()->connection()->CloseConnection(
-        QUIC_HTTP_DECODER_ERROR, frame_type + " frame received on data stream",
+        QUIC_HTTP_DECODER_ERROR,
+        QuicStrCat(frame_type, " frame received on data stream"),
         ConnectionCloseBehavior::SEND_CONNECTION_CLOSE_PACKET);
   }