Persist sessionStorage on disk.

content/browser/dom_storage/dom_storage_context_impl.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 CONTENT_BROWSER_DOM_STORAGE_DOM_STORAGE_CONTEXT_IMPL_H_
 #define CONTENT_BROWSER_DOM_STORAGE_DOM_STORAGE_CONTEXT_IMPL_H_
 #pragma once
 
 #include "base/file_path.h"
 #include "base/memory/ref_counted.h"
 #include "base/string16.h"
 #include "base/time.h"
 #include "content/public/browser/dom_storage_context.h"
 #include "webkit/dom_storage/dom_storage_types.h"
 
+namespace content {
+class SessionStorageNamespace;
+}
+
 namespace dom_storage {
 class DomStorageContext;
 }
 
 namespace quota {
 class SpecialStoragePolicy;
 }
 
 // This is owned by BrowserContext (aka Profile) and encapsulates all
 // per-profile dom storage state.
 class CONTENT_EXPORT DOMStorageContextImpl :
     NON_EXPORTED_BASE(public content::DOMStorageContext),
     public base::RefCountedThreadSafe<DOMStorageContextImpl> {
  public:
   // If |data_path| is empty, nothing will be saved to disk.
   DOMStorageContextImpl(const FilePath& data_path,
-                        quota::SpecialStoragePolicy* special_storage_policy);
+                        quota::SpecialStoragePolicy* special_storage_policy,
+                        bool session_storage_on_disk);
 
   // DOMStorageContext implementation.
   virtual void GetAllStorageFiles(
       const GetAllStorageFilesCallback& callback) OVERRIDE;
   virtual FilePath GetFilePath(const string16& origin_id) const OVERRIDE;
   virtual void DeleteForOrigin(const string16& origin_id) OVERRIDE;
   virtual void DeleteLocalStorageFile(const FilePath& file_path) OVERRIDE;
   virtual void DeleteDataModifiedSince(const base::Time& cutoff) OVERRIDE;
+  virtual void DoomSessionStorage(int64 namespace_id) OVERRIDE;
+
+  virtual content::SessionStorageNamespace* CreateSessionStorage(
+      const std::string& persistent_id) OVERRIDE;
 
   // Called to free up memory that's not strictly needed.
   void PurgeMemory();
 
   // Used by content settings to alter the behavior around
   // what data to keep and what data to discard at shutdown.
   // The policy is not so straight forward to describe, see
   // the implementation for details.
   void SetClearLocalState(bool clear_local_state);
   void SaveSessionState();
@@ skipping 12 matching lines @@
 
   virtual ~DOMStorageContextImpl();
   dom_storage::DomStorageContext* context() const { return context_.get(); }
 
   scoped_refptr<dom_storage::DomStorageContext> context_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(DOMStorageContextImpl);
 };
 
 #endif  // CONTENT_BROWSER_DOM_STORAGE_DOM_STORAGE_CONTEXT_IMPL_H_