Fix SessionStorage confusion between RenderViewHostImpl and NavigationController.

content/browser/renderer_host/render_view_host_delegate.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_RENDERER_HOST_RENDER_VIEW_HOST_DELEGATE_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_VIEW_HOST_DELEGATE_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 40 matching lines @@
 class RenderViewHostDelegateView;
 class SessionStorageNamespace;
 class WebContents;
 class WebContentsImpl;
 struct ContextMenuParams;
 struct FileChooserParams;
 struct GlobalRequestID;
 struct NativeWebKeyboardEvent;
 struct Referrer;
 struct RendererPreferences;
+class SiteInstance;
 
 //
 // RenderViewHostDelegate
 //
 //  An interface implemented by an object interested in knowing about the state
 //  of the RenderViewHost.
 //
 //  This interface currently encompasses every type of message that was
 //  previously being sent by WebContents itself. Some of these notifications
 //  may not be relevant to all users of RenderViewHost and we should consider
@@ skipping 336 matching lines @@
   // provided in the supplied params.
   virtual void ShowContextMenu(const ContextMenuParams& params) {}
 
   // The render view has requested access to media devices listed in
   // |request|, and the client should grant or deny that permission by
   // calling |callback|.
   virtual void RequestMediaAccessPermission(
       const MediaStreamRequest& request,
       const MediaResponseCallback& callback) {}
 
+  // Returns the SessionStorageNamespace the render view should use. Might
+  // create the SessionStorageNamespace on the fly.
+  virtual SessionStorageNamespace* GetSessionStorageNamespace(
+      SiteInstance* instance);
+
  protected:
   virtual ~RenderViewHostDelegate() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_VIEW_HOST_DELEGATE_H_