[CacheStorage] Give cache directories unique names

content/browser/cache_storage/cache_storage_cache.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_CACHE_H_
 #define CONTENT_BROWSER_CACHE_STORAGE_CACHE_STORAGE_CACHE_H_
 
 #include <vector>
 
 #include "base/callback.h"
@@ skipping 89 matching lines @@
   void Keys(const RequestsCallback& callback);
 
   // Closes the backend. Future operations that require the backend
   // will exit early. Close should only be called once per CacheStorageCache.
   void Close(const base::Closure& callback);
 
   // The size of the cache contents in memory. Returns 0 if the cache backend is
   // not a memory cache backend.
   int64 MemoryBackedSize() const;
 
+  base::FilePath path() const { return path_; }
+
   base::WeakPtr<CacheStorageCache> AsWeakPtr();
 
  private:
   friend class base::RefCounted<CacheStorageCache>;
   friend class TestCacheStorageCache;
 
   struct OpenAllEntriesContext;
   struct MatchAllContext;
   struct KeysContext;
   struct PutContext;
@@ skipping 153 matching lines @@
   bool memory_only_;
 
   base::WeakPtrFactory<CacheStorageCache> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(CacheStorageCache);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_CACHE_STORAGE_CACHE_STORAGE_CACHE_H_