Move shared files in net/quic/ into net/quic/core/

net/quic/core/quic_simple_buffer_allocator.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_simple_buffer_allocator.h"
+#include "net/quic/core/quic_simple_buffer_allocator.h"
 
 namespace net {
 
 char* SimpleBufferAllocator::New(size_t size) {
   return new char[size];
 }
 
 char* SimpleBufferAllocator::New(size_t size, bool /* flag_enable */) {
   return New(size);
 }
 
 void SimpleBufferAllocator::Delete(char* buffer) {
   delete[] buffer;
 }
 
 }  // namespace net