Move dom_storage to new locations.

webkit/dom_storage/dom_storage_cached_area.h

-// 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.
-
-#ifndef WEBKIT_DOM_STORAGE_DOM_STORAGE_CACHED_AREA_H_
-#define WEBKIT_DOM_STORAGE_DOM_STORAGE_CACHED_AREA_H_
-
-#include <map>
-
-#include "base/memory/ref_counted.h"
-#include "base/memory/weak_ptr.h"
-#include "base/nullable_string16.h"
-#include "googleurl/src/gurl.h"
-#include "webkit/storage/webkit_storage_export.h"
-
-namespace dom_storage {
-
-class DomStorageMap;
-class DomStorageProxy;
-
-// Unlike the other classes in the dom_storage library, this one is intended
-// for use in renderer processes. It maintains a complete cache of the
-// origin's Map of key/value pairs for fast access. The cache is primed on
-// first access and changes are written to the backend thru the |proxy|.
-// Mutations originating in other processes are applied to the cache via
-// the ApplyMutation method.
-class WEBKIT_STORAGE_EXPORT DomStorageCachedArea :
-      public base::RefCounted<DomStorageCachedArea> {
- public:
-  DomStorageCachedArea(int64 namespace_id, const GURL& origin,
-                       DomStorageProxy* proxy);
-
-  int64 namespace_id() const { return namespace_id_; }
-  const GURL& origin() const { return origin_; }
-
-  unsigned GetLength(int connection_id);
-  NullableString16 GetKey(int connection_id, unsigned index);
-  NullableString16 GetItem(int connection_id, const base::string16& key);
-  bool SetItem(int connection_id,
-               const base::string16& key,
-               const base::string16& value,
-               const GURL& page_url);
-  void RemoveItem(int connection_id, const base::string16& key,
-                  const GURL& page_url);
-  void Clear(int connection_id, const GURL& page_url);
-
-  void ApplyMutation(const NullableString16& key,
-                     const NullableString16& new_value);
-
-  size_t MemoryBytesUsedByCache() const;
-
- private:
-  friend class DomStorageCachedAreaTest;
-  friend class base::RefCounted<DomStorageCachedArea>;
-  ~DomStorageCachedArea();
-
-  // Primes the cache, loading all values for the area.
-  void Prime(int connection_id);
-  void PrimeIfNeeded(int connection_id) {
-    if (!map_.get())
-      Prime(connection_id);
-  }
-
-  // Resets the object back to its newly constructed state.
-  void Reset();
-
-  // Async completion callbacks for proxied operations.
-  // These are used to maintain cache consistency by preventing
-  // mutation events from other processes from overwriting local
-  // changes made after the mutation.
-  void OnLoadComplete(bool success);
-  void OnSetItemComplete(const base::string16& key, bool success);
-  void OnClearComplete(bool success);
-  void OnRemoveItemComplete(const base::string16& key, bool success);
-
-  bool should_ignore_key_mutation(const base::string16& key) const {
-    return ignore_key_mutations_.find(key) != ignore_key_mutations_.end();
-  }
-
-  bool ignore_all_mutations_;
-  std::map<base::string16, int> ignore_key_mutations_;
-
-  int64 namespace_id_;
-  GURL origin_;
-  scoped_refptr<DomStorageMap> map_;
-  scoped_refptr<DomStorageProxy> proxy_;
-  base::WeakPtrFactory<DomStorageCachedArea> weak_factory_;
-};
-
-}  // namespace dom_storage
-
-#endif  // WEBKIT_DOM_STORAGE_DOM_STORAGE_CACHED_AREA_H_