Move webkit/{browser,common}/dom_storage into content/

webkit/browser/dom_storage/dom_storage_namespace.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_BROWSER_DOM_STORAGE_DOM_STORAGE_NAMESPACE_H_
-#define WEBKIT_BROWSER_DOM_STORAGE_DOM_STORAGE_NAMESPACE_H_
-
-#include <map>
-
-#include "base/basictypes.h"
-#include "base/files/file_path.h"
-#include "base/memory/ref_counted.h"
-#include "webkit/browser/webkit_storage_browser_export.h"
-
-class GURL;
-
-namespace dom_storage {
-
-class DomStorageArea;
-class DomStorageTaskRunner;
-class SessionStorageDatabase;
-
-// Container for the set of per-origin Areas.
-// See class comments for DomStorageContext for a larger overview.
-class WEBKIT_STORAGE_BROWSER_EXPORT DomStorageNamespace
-    : public base::RefCountedThreadSafe<DomStorageNamespace> {
- public:
-  // Option for PurgeMemory.
-  enum PurgeOption {
-    // Purge unopened areas only.
-    PURGE_UNOPENED,
-
-    // Purge aggressively, i.e. discard cache even for areas that have
-    // non-zero open count.
-    PURGE_AGGRESSIVE,
-  };
-
-  // Constructor for a LocalStorage namespace with id of 0
-  // and an optional backing directory on disk.
-  DomStorageNamespace(const base::FilePath& directory,  // may be empty
-                      DomStorageTaskRunner* task_runner);
-
-  // Constructor for a SessionStorage namespace with a non-zero id and an
-  // optional backing on disk via |session_storage_database| (may be NULL).
-  DomStorageNamespace(int64 namespace_id,
-                      const std::string& persistent_namespace_id,
-                      SessionStorageDatabase* session_storage_database,
-                      DomStorageTaskRunner* task_runner);
-
-  int64 namespace_id() const { return namespace_id_; }
-  const std::string& persistent_namespace_id() const {
-    return persistent_namespace_id_;
-  }
-
-  // Returns the storage area for the given origin,
-  // creating instance if needed. Each call to open
-  // must be balanced with a call to CloseStorageArea.
-  DomStorageArea* OpenStorageArea(const GURL& origin);
-  void CloseStorageArea(DomStorageArea* area);
-
-  // Returns the area for |origin| if it's open, otherwise NULL.
-  DomStorageArea* GetOpenStorageArea(const GURL& origin);
-
-  // Creates a clone of |this| namespace including
-  // shallow copies of all contained areas.
-  // Should only be called for session storage namespaces.
-  DomStorageNamespace* Clone(int64 clone_namespace_id,
-                             const std::string& clone_persistent_namespace_id);
-
-  void DeleteLocalStorageOrigin(const GURL& origin);
-  void DeleteSessionStorageOrigin(const GURL& origin);
-  void PurgeMemory(PurgeOption purge);
-  void Shutdown();
-
-  unsigned int CountInMemoryAreas() const;
-
- private:
-  friend class base::RefCountedThreadSafe<DomStorageNamespace>;
-
-  // Struct to hold references to our contained areas and
-  // to keep track of how many tabs have a given area open.
-  struct AreaHolder {
-    scoped_refptr<DomStorageArea> area_;
-    int open_count_;
-    AreaHolder();
-    AreaHolder(DomStorageArea* area, int count);
-    ~AreaHolder();
-  };
-  typedef std::map<GURL, AreaHolder> AreaMap;
-
-  ~DomStorageNamespace();
-
-  // Returns a pointer to the area holder in our map or NULL.
-  AreaHolder* GetAreaHolder(const GURL& origin);
-
-  int64 namespace_id_;
-  std::string persistent_namespace_id_;
-  base::FilePath directory_;
-  AreaMap areas_;
-  scoped_refptr<DomStorageTaskRunner> task_runner_;
-  scoped_refptr<SessionStorageDatabase> session_storage_database_;
-};
-
-}  // namespace dom_storage
-
-
-#endif  // WEBKIT_BROWSER_DOM_STORAGE_DOM_STORAGE_NAMESPACE_H_