Remove unused fields from //content.

content/browser/cache_storage/cache_storage.h

 // Copyright 2014 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.
 
 #ifndef CONTENT_BROWSER_CACHE_STORAGE_CACHE_STORAGE_H_
 #define CONTENT_BROWSER_CACHE_STORAGE_CACHE_STORAGE_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 211 matching lines @@
 
   // The names of caches in the order that they were created.
   StringVector ordered_cache_names_;
 
   // The file path for this CacheStorage.
   base::FilePath origin_path_;
 
   // The TaskRunner to run file IO on.
   scoped_refptr<base::SequencedTaskRunner> cache_task_runner_;
 
-  // Whether or not to store data in disk or memory.
-  bool memory_only_;
-
   // Performs backend specific operations (memory vs disk).
   std::unique_ptr<CacheLoader> cache_loader_;
 
   // Holds ref pointers to recently opened caches so that they can be reused
   // without having the open the cache again.
   std::map<const CacheStorageCache*, scoped_refptr<CacheStorageCache>>
       preserved_caches_;
 
   // The quota manager.
   scoped_refptr<storage::QuotaManagerProxy> quota_manager_proxy_;
 
   // The origin that this CacheStorage is associated with.
   GURL origin_;
 
   base::WeakPtrFactory<CacheStorage> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(CacheStorage);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_CACHE_STORAGE_CACHE_STORAGE_H_