Reorganize net/disk_cache into backend specific directories.

net/disk_cache/memory/mem_rankings.cc

 // Copyright (c) 2006-2008 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/disk_cache/mem_rankings.h"
+#include "net/disk_cache/memory/mem_rankings.h"
 
 #include "base/logging.h"
-#include "net/disk_cache/mem_entry_impl.h"
+#include "net/disk_cache/memory/mem_entry_impl.h"
 
 namespace disk_cache {
 
 MemRankings::~MemRankings() {
   DCHECK(!head_ && !tail_);
 }
 
 void MemRankings::Insert(MemEntryImpl* node) {
   if (head_)
     head_->set_prev(node);
@@ skipping 39 matching lines @@
 }
 
 MemEntryImpl* MemRankings::GetPrev(MemEntryImpl* node) {
   if (!node)
     return tail_;
 
   return node->prev();
 }
 
 }  // namespace disk_cache