Prerendered tabs use the same SessionStorage namespace as the tab that triggered the prerender.

chrome/browser/prerender/prerender_contents.h

 // Copyright (c) 2011 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_PRERENDER_PRERENDER_CONTENTS_H_
 #define CHROME_BROWSER_PRERENDER_PRERENDER_CONTENTS_H_
 #pragma once
 
 #include <list>
 #include <string>
@@ skipping 41 matching lines @@
   class Factory {
    public:
     Factory() {}
     virtual ~Factory() {}
 
     // Ownership is not transfered through this interface as prerender_manager,
     // prerender_tracker, and profile are stored as weak pointers.
     virtual PrerenderContents* CreatePrerenderContents(
         PrerenderManager* prerender_manager,
         PrerenderTracker* prerender_tracker,
+        SessionStorageNamespace* session_storage_namespace,
         Profile* profile,
         const GURL& url,
         const GURL& referrer,
         Origin origin,
         uint8 experiment_id) = 0;
 
    private:
     DISALLOW_COPY_AND_ASSIGN(Factory);
   };
 
@@ skipping 114 matching lines @@
   // Returns true if |url| corresponds to a pending prerender.
   bool IsPendingEntry(const GURL& url) const;
 
   // Reissues any pending prerender requests from the prerendered page.  Also
   // clears the list of pending requests.
   void StartPendingPrerenders();
 
  protected:
   PrerenderContents(PrerenderManager* prerender_manager,
                     PrerenderTracker* prerender_tracker,
+                    SessionStorageNamespace* session_storage_namespace,
                     Profile* profile,
                     const GURL& url,
                     const GURL& referrer,
                     Origin origin,
                     uint8 experiment_id);
 
   // Called whenever a RenderViewHost is created for prerendering.  Only called
   // once the RenderViewHost has a RenderView and RenderWidgetHostView.
   virtual void OnRenderViewHostCreated(RenderViewHost* new_render_view_host);
 
@@ skipping 21 matching lines @@
 
   // Returns the ProcessMetrics for the render process, if it exists.
   base::ProcessMetrics* MaybeGetProcessMetrics();
 
   // The prerender manager owning this object.
   PrerenderManager* prerender_manager_;
 
   // The prerender tracker tracking prerenders.
   PrerenderTracker* prerender_tracker_;
 
+  // The sessionStorage namespace of the tab that generated this prerender.
+  scoped_refptr<SessionStorageNamespace> session_storage_namespace_;
+
   // The URL being prerendered.
   GURL prerender_url_;
 
   // The referrer.
   GURL referrer_;
 
   // The NavigationParameters of the finished navigation.
   scoped_ptr<ViewHostMsg_FrameNavigate_Params> navigate_params_;
 
   // The profile being used
@@ skipping 61 matching lines @@
 
   // Offset by which to offset prerendered pages
   static const int32 kPrerenderPageIdOffset = 10;
 
   DISALLOW_COPY_AND_ASSIGN(PrerenderContents);
 };
 
 }  // namespace prerender
 
 #endif  // CHROME_BROWSER_PRERENDER_PRERENDER_CONTENTS_H_