Simplify QUIC's encryption path now that FEC is gone. Protected by FLAG_quic_inplace_encryption.

net/quic/quic_framer.cc

 // Copyright (c) 2012 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/quic/quic_framer.h"
 
 #include <stdint.h>
 
 #include "base/compiler_specific.h"
 #include "base/logging.h"
@@ skipping 1614 matching lines @@
 const QuicDecrypter* QuicFramer::alternative_decrypter() const {
   return alternative_decrypter_.get();
 }
 
 void QuicFramer::SetEncrypter(EncryptionLevel level, QuicEncrypter* encrypter) {
   DCHECK_GE(level, 0);
   DCHECK_LT(level, NUM_ENCRYPTION_LEVELS);
   encrypter_[level].reset(encrypter);
 }
 
+size_t QuicFramer::EncryptInPlace(EncryptionLevel level,
+                                  QuicPathId path_id,
+                                  QuicPacketNumber packet_number,
+                                  size_t ad_len,
+                                  size_t total_len,
+                                  size_t buffer_len,
+                                  char* buffer) {
+  size_t output_length = 0;
+  if (!encrypter_[level]->EncryptPacket(
+          path_id, packet_number,
+          StringPiece(buffer, ad_len),                       // Associated data
+          StringPiece(buffer + ad_len, total_len - ad_len),  // Plaintext
+          buffer + ad_len,  // Destination buffer
+          &output_length, buffer_len - ad_len)) {
+    RaiseError(QUIC_ENCRYPTION_FAILURE);
+    return 0;
+  }
+
+  return ad_len + output_length;
+}
+
 size_t QuicFramer::EncryptPayload(EncryptionLevel level,
                                   QuicPathId path_id,
                                   QuicPacketNumber packet_number,
                                   const QuicPacket& packet,
                                   char* buffer,
                                   size_t buffer_len) {
   DCHECK(encrypter_[level].get() != nullptr);
 
   StringPiece associated_data = packet.AssociatedData();
   // Copy in the header, because the encrypter only populates the encrypted
@@ skipping 576 matching lines @@
 
 bool QuicFramer::RaiseError(QuicErrorCode error) {
   DVLOG(1) << "Error: " << QuicUtils::ErrorToString(error)
            << " detail: " << detailed_error_;
   set_error(error);
   visitor_->OnError(this);
   return false;
 }
 
 }  // namespace net