Simplify header lengths field.

headers_lengths and trailers_lengths are only used for their payload length, so we might as well only store payload lengths.

gfe-relnote: v99 only, not protected.
PiperOrigin-RevId: 259636587
Change-Id: I455864328f5c37cb3ba4d080d29f4c2e87e6597d

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 a8e81c1..97991e8 100644
--- a/quic/core/http/quic_spdy_stream.cc
+++ b/quic/core/http/quic_spdy_stream.cc
@@ -180,8 +180,8 @@
       visitor_(nullptr),
       blocked_on_decoding_headers_(false),
       headers_decompressed_(false),
-      headers_length_(0, 0),
-      trailers_length_(0, 0),
+      headers_payload_length_(0),
+      trailers_payload_length_(0),
       trailers_decompressed_(false),
       trailers_consumed_(false),
       priority_sent_(false),
@@ -216,8 +216,8 @@
       visitor_(nullptr),
       blocked_on_decoding_headers_(false),
       headers_decompressed_(false),
-      headers_length_(0, 0),
-      trailers_length_(0, 0),
+      headers_payload_length_(0),
+      trailers_payload_length_(0),
       trailers_decompressed_(false),
       trailers_consumed_(false),
       priority_sent_(false),
@@ -858,9 +858,9 @@
   }
 
   if (headers_decompressed_) {
-    trailers_length_ = frame_length;
+    trailers_payload_length_ = frame_length.payload_length;
   } else {
-    headers_length_ = frame_length;
+    headers_payload_length_ = frame_length.payload_length;
   }
 
   qpack_decoded_headers_accumulator_ =
@@ -921,8 +921,8 @@
 
 void QuicSpdyStream::ProcessDecodedHeaders(const QuicHeaderList& headers) {
   const QuicByteCount frame_length = headers_decompressed_
-                                         ? trailers_length_.payload_length
-                                         : headers_length_.payload_length;
+                                         ? trailers_payload_length_
+                                         : headers_payload_length_;
   OnStreamHeaderList(/* fin = */ false, frame_length, headers);
   qpack_decoded_headers_accumulator_.reset();
 }

quic/core/http/quic_spdy_stream.h

diff --git a/quic/core/http/quic_spdy_stream.h b/quic/core/http/quic_spdy_stream.h
index 9cd7827..bdb8752 100644
--- a/quic/core/http/quic_spdy_stream.h
+++ b/quic/core/http/quic_spdy_stream.h
@@ -281,10 +281,10 @@
   // Contains a copy of the decompressed header (name, value) pairs until they
   // are consumed via Readv.
   QuicHeaderList header_list_;
-  // Length of HEADERS frame, including frame header and payload.
-  Http3FrameLengths headers_length_;
-  // Length of TRAILERS frame, including frame header and payload.
-  Http3FrameLengths trailers_length_;
+  // Length of HEADERS frame payload.
+  QuicByteCount headers_payload_length_;
+  // Length of TRAILERS frame payload.
+  QuicByteCount trailers_payload_length_;
 
   // True if the trailers have been completely decompressed.
   bool trailers_decompressed_;