Deprecate gfe2_reloadable_flag_quic_use_fast_huffman_encoder.

PiperOrigin-RevId: 344845112
Change-Id: I59cf623badd1cee60f32251962cca123d9aac0d5

quic/core/qpack/qpack_instruction_encoder.cc

diff --git a/quic/core/qpack/qpack_instruction_encoder.cc b/quic/core/qpack/qpack_instruction_encoder.cc
index c796654..d114ece 100644
--- a/quic/core/qpack/qpack_instruction_encoder.cc
+++ b/quic/core/qpack/qpack_instruction_encoder.cc
@@ -20,13 +20,7 @@
       string_length_(0),
       byte_(0),
       state_(State::kOpcode),
-      instruction_(nullptr),
-      use_fast_huffman_encoder_(
-          GetQuicReloadableFlag(quic_use_fast_huffman_encoder)) {
-  if (use_fast_huffman_encoder_) {
-    QUIC_RELOADABLE_FLAG_COUNT(quic_use_fast_huffman_encoder);
-  }
-}
+      instruction_(nullptr) {}
 
 void QpackInstructionEncoder::Encode(
     const QpackInstructionWithValues& instruction_with_values,
@@ -171,11 +165,7 @@
   absl::string_view string_to_write =
       (field_->type == QpackInstructionFieldType::kName) ? name : value;
   if (use_huffman_) {
-    if (use_fast_huffman_encoder_) {
-      http2::HuffmanEncodeFast(string_to_write, string_length_, output);
-    } else {
-      http2::HuffmanEncode(string_to_write, string_length_, output);
-    }
+    http2::HuffmanEncodeFast(string_to_write, string_length_, output);
   } else {
     QuicStrAppend(output, string_to_write);
   }

quic/core/qpack/qpack_instruction_encoder.h

diff --git a/quic/core/qpack/qpack_instruction_encoder.h b/quic/core/qpack/qpack_instruction_encoder.h
index 4f6fac7..f2e2f4e 100644
--- a/quic/core/qpack/qpack_instruction_encoder.h
+++ b/quic/core/qpack/qpack_instruction_encoder.h
@@ -77,9 +77,6 @@
 
   // Field currently being decoded.
   QpackInstructionFields::const_iterator field_;
-
-  // Latched value of gfe2_reloadable_flag_quic_use_fast_huffman_encoder.
-  const bool use_fast_huffman_encoder_;
 };
 
 }  // namespace quic

quic/core/quic_flags_list.h

diff --git a/quic/core/quic_flags_list.h b/quic/core/quic_flags_list.h
index 01062fd..0792052 100644
--- a/quic/core/quic_flags_list.h
+++ b/quic/core/quic_flags_list.h
@@ -71,7 +71,6 @@
 QUIC_FLAG(FLAGS_quic_reloadable_flag_quic_unified_iw_options, false)
 QUIC_FLAG(FLAGS_quic_reloadable_flag_quic_use_circular_deque_for_unacked_packets_v2, false)
 QUIC_FLAG(FLAGS_quic_reloadable_flag_quic_use_encryption_level_context, false)
-QUIC_FLAG(FLAGS_quic_reloadable_flag_quic_use_fast_huffman_encoder, true)
 QUIC_FLAG(FLAGS_quic_reloadable_flag_quic_use_write_or_buffer_data_at_level, false)
 QUIC_FLAG(FLAGS_quic_reloadable_flag_send_quic_fallback_server_config_on_leto_error, false)
 QUIC_FLAG(FLAGS_quic_restart_flag_dont_fetch_quic_private_keys_from_leto, false)