Implement special origin database handling for Isolated Apps

webkit/browser/fileapi/sandbox_origin_database_interface.h

+// Copyright 2013 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_FILEAPI_SANDBOX_ORIGIN_DATABASE_INTERFACE_H_
+#define WEBKIT_BROWSER_FILEAPI_SANDBOX_ORIGIN_DATABASE_INTERFACE_H_
+
+#include <string>
+#include <vector>
+
+#include "base/files/file_path.h"
+#include "webkit/storage/webkit_storage_export.h"
+
+namespace fileapi {
+
+class WEBKIT_STORAGE_EXPORT_PRIVATE SandboxOriginDatabaseInterface {
+ public:
+  struct WEBKIT_STORAGE_EXPORT_PRIVATE OriginRecord {
+    std::string origin;
+    base::FilePath path;
+
+    OriginRecord();
+    OriginRecord(const std::string& origin, const base::FilePath& path);
+    ~OriginRecord();
+  };
+
+  virtual ~SandboxOriginDatabaseInterface() {}
+
+  // Returns true if the origin's path is included in this database.
+  virtual bool HasOriginPath(const std::string& origin) = 0;
+
+  // This will produce a unique path and add it to its database, if it's not
+  // already present.
+  virtual bool GetPathForOrigin(const std::string& origin,
+                                base::FilePath* directory) = 0;
+
+  // Removes the origin's path from the database.
+  // Returns success if the origin has been successfully removed, or
+  // the origin is not found.
+  // (This doesn't remove the actual path).
+  virtual bool RemovePathForOrigin(const std::string& origin) = 0;
+
+  // Lists all origins in this database.
+  virtual bool ListAllOrigins(std::vector<OriginRecord>* origins) = 0;
+
+  // This will release all database resources in use; call it to save memory.
+  virtual void DropDatabase() = 0;
+
+ protected:
+  SandboxOriginDatabaseInterface() {}
+};
+
+}  // namespace fileapi
+
+#endif  // WEBKIT_BROWSER_FILEAPI_SANDBOX_ORIGIN_DATABASE_INTERFACE_H_