Move QuicBufferAllocator into its own .cc/.h. No behavior change.

net/quic/core/quic_protocol.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/core/quic_protocol.h"
 
 #include "base/memory/ptr_util.h"
 #include "base/strings/string_number_conversions.h"
 #include "net/quic/core/quic_flags.h"
 #include "net/quic/core/quic_utils.h"
@@ skipping 79 matching lines @@
 
 QuicPacketHeader::QuicPacketHeader(const QuicPacketHeader& other) = default;
 
 QuicPublicResetPacket::QuicPublicResetPacket()
     : nonce_proof(0), rejected_packet_number(0) {}
 
 QuicPublicResetPacket::QuicPublicResetPacket(
     const QuicPacketPublicHeader& header)
     : public_header(header), nonce_proof(0), rejected_packet_number(0) {}
 
-QuicBufferAllocator::~QuicBufferAllocator() = default;
-
 void StreamBufferDeleter::operator()(char* buffer) const {
   if (allocator_ != nullptr && buffer != nullptr) {
     allocator_->Delete(buffer);
   }
 }
 
 UniqueStreamBuffer NewStreamBuffer(QuicBufferAllocator* allocator,
                                    size_t size) {
   return UniqueStreamBuffer(allocator->New(size),
                             StreamBufferDeleter(allocator));
@@ skipping 631 matching lines @@
       is_unackable(false),
       has_crypto_handshake(has_crypto_handshake),
       num_padding_bytes(num_padding_bytes),
       retransmission(0) {}
 
 TransmissionInfo::TransmissionInfo(const TransmissionInfo& other) = default;
 
 TransmissionInfo::~TransmissionInfo() {}
 
 }  // namespace net