Fix SessionStorage

chrome/browser/in_process_webkit/session_storage_namespace.h

+// Copyright (c) 2010 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 CHROME_BROWSER_IN_PROCESS_WEBKIT_SESSION_STORAGE_NAMESPACE_H_
+#define CHROME_BROWSER_IN_PROCESS_WEBKIT_SESSION_STORAGE_NAMESPACE_H_
+#pragma once
+
+#include "base/basictypes.h"
+#include "base/ref_counted.h"
+
+class Profile;
+class WebKitContext;
+
+// This is a ref-counted class that represents a SessionStorageNamespace.
+// On destruction it ensures that the storage namespace is destroyed.
+// NOTE: That if we're shutting down, we don't strictly need to do this, but
+//       it keeps valgrind happy.
+class SessionStorageNamespace
+    : public base::RefCountedThreadSafe<SessionStorageNamespace> {
+ public:
+  explicit SessionStorageNamespace(Profile* profile);
+
+  int64 id() const { return id_; }
+
+  // The session storage namespace parameter allows multiple render views and
+  // tab contentses to share the same session storage (part of the WebStorage
+  // spec) space. Passing in NULL simply allocates a new one which is often the
+  // correct thing to do (especially in tests.
+  SessionStorageNamespace* Clone();
+
+ private:
+  SessionStorageNamespace(WebKitContext* webkit_context, int64 id);
+
+  friend class base::RefCountedThreadSafe<SessionStorageNamespace>;
+  ~SessionStorageNamespace();
+
+  scoped_refptr<WebKitContext> webkit_context_;
+
+  // The session storage namespace id.
+  int64 id_;
+
+  DISALLOW_IMPLICIT_CONSTRUCTORS(SessionStorageNamespace);
+};
+
+#endif  // CHROME_BROWSER_IN_PROCESS_WEBKIT_SESSION_STORAGE_NAMESPACE_H_