Introduce all the plumbing for Session Storage. This mostly consists of crea...

chrome/browser/in_process_webkit/dom_storage_namespace.h

 // Copyright (c) 2009 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_DOM_STORAGE_NAMESPACE_H_
 #define CHROME_BROWSER_IN_PROCESS_WEBKIT_DOM_STORAGE_NAMESPACE_H_
 
 #include "base/string16.h"
 #include "base/hash_tables.h"
 #include "base/scoped_ptr.h"
-#include "chrome/common/dom_storage_type.h"
+#include "chrome/common/dom_storage_common.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebString.h"
 
 class DOMStorageArea;
 class DOMStorageContext;
 class FilePath;
 
 namespace WebKit {
 class WebStorageArea;
 class WebStorageNamespace;
 }
 
 // Only to be used on the WebKit thread.
 class DOMStorageNamespace {
  public:
   static DOMStorageNamespace* CreateLocalStorageNamespace(
       DOMStorageContext* dom_storage_context, const FilePath& data_dir_path);
   static DOMStorageNamespace* CreateSessionStorageNamespace(
-      DOMStorageContext* dom_storage_context);
+      DOMStorageContext* dom_storage_context, int64 namespace_id);
 
   ~DOMStorageNamespace();
 
   DOMStorageArea* GetStorageArea(const string16& origin);
-  DOMStorageNamespace* Copy();
+  DOMStorageNamespace* Copy(int64 clone_namespace_id);
   void PurgeMemory();
 
   const DOMStorageContext* dom_storage_context() const {
     return dom_storage_context_;
   }
   int64 id() const { return id_; }
   DOMStorageType dom_storage_type() const { return dom_storage_type_; }
 
   // Creates a WebStorageArea for the given origin.  This should only be called
   // by an owned DOMStorageArea.
@@ skipping 29 matching lines @@
   // SessionStorage vs. LocalStorage.
   const DOMStorageType dom_storage_type_;
 
   // The quota for each storage area.  Suggested by the spec.
   static const unsigned kLocalStorageQuota = 5 * 1024 * 1024;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(DOMStorageNamespace);
 };
 
 #endif  // CHROME_BROWSER_IN_PROCESS_WEBKIT_DOM_STORAGE_NAMESPACE_H_