[CacheStorage] Temporarily preserve recently opened caches from CacheStorageDispatcherHost

content/browser/cache_storage/cache_storage.h

Index: content/browser/cache_storage/cache_storage.h
diff --git a/content/browser/cache_storage/cache_storage.h b/content/browser/cache_storage/cache_storage.h
index 525e6167a83b2f926cdd8c55cccee66f211c5229..20376c1257e2762f4ac5a66f1693f56a760fcc3a 100644
--- a/content/browser/cache_storage/cache_storage.h
+++ b/content/browser/cache_storage/cache_storage.h
@@ -112,7 +112,6 @@ class CONTENT_EXPORT CacheStorage {
  private:
   friend class CacheStorageCacheHandle;
   friend class CacheStorageCache;
-  friend class TestCacheStorage;
   class CacheLoader;
   class MemoryLoader;
   class SimpleCacheLoader;
@@ -131,14 +130,6 @@ class CONTENT_EXPORT CacheStorage {
   std::unique_ptr<CacheStorageCacheHandle> GetLoadedCache(
       const std::string& cache_name);
 
-  // Holds a reference to a cache for a short period in case they're used again
-  // soon.
-  void TemporarilyPreserveCache(
-      std::unique_ptr<CacheStorageCacheHandle> cache_handle);
-  virtual void SchedulePreservedCacheRemoval(
-      const base::Closure& callback);  // Virtual for testing.
-  void RemovePreservedCache(const CacheStorageCache* cache);
-
   // Initializer and its callback are below.
   void LazyInit();
   void LazyInitImpl();
@@ -260,11 +251,6 @@ class CONTENT_EXPORT CacheStorage {
   // Performs backend specific operations (memory vs disk).
   std::unique_ptr<CacheLoader> cache_loader_;
 
-  // Holds handles to recently opened caches so that they can be reused
-  // without having to open the cache again.
-  std::map<const CacheStorageCache*, std::unique_ptr<CacheStorageCacheHandle>>
-      preserved_caches_;
-
   // The quota manager.
   scoped_refptr<storage::QuotaManagerProxy> quota_manager_proxy_;