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

chrome/browser/prerender/prerender_manager_unittest.cc

 // 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.
 
 #include "base/memory/scoped_vector.h"
 #include "base/time.h"
 #include "chrome/browser/prerender/prerender_contents.h"
 #include "chrome/browser/prerender/prerender_manager.h"
 #include "chrome/browser/prerender/prerender_origin.h"
 #include "chrome/test/base/testing_browser_process.h"
 #include "content/browser/renderer_host/render_process_host.h"
 #include "content/browser/renderer_host/render_view_host.h"
 #include "content/test/test_browser_thread.h"
 #include "googleurl/src/gurl.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace prerender {
 
 namespace {
 
 class DummyPrerenderContents : public PrerenderContents {
  public:
   DummyPrerenderContents(PrerenderManager* prerender_manager,
                          PrerenderTracker* prerender_tracker,
                          const GURL& url,
                          FinalStatus expected_final_status)
-      : PrerenderContents(prerender_manager, prerender_tracker, NULL, url,
-                          GURL(), ORIGIN_LINK_REL_PRERENDER,
+      : PrerenderContents(prerender_manager, prerender_tracker,
+                          NULL, url, GURL(), ORIGIN_LINK_REL_PRERENDER,
                           PrerenderManager::kNoExperiment),
         has_started_(false),
         expected_final_status_(expected_final_status) {
   }
 
   virtual ~DummyPrerenderContents() {
     EXPECT_EQ(expected_final_status_, final_status());
   }
 
   virtual void StartPrerendering(
-      const RenderViewHost* source_render_view_host) OVERRIDE {
+      const RenderViewHost* source_render_view_host,
+      SessionStorageNamespace* session_storage_namespace) OVERRIDE {
     has_started_ = true;
   }
 
   virtual bool GetChildId(int* child_id) const OVERRIDE {
     *child_id = 0;
     return true;
   }
 
   virtual bool GetRouteId(int* route_id) const OVERRIDE {
     *route_id = 0;
@@ skipping 469 matching lines @@
           url,
           FINAL_STATUS_CACHE_OR_HISTORY_CLEARED);
   EXPECT_TRUE(prerender_manager()->AddSimplePrerender(url));
   EXPECT_TRUE(prerender_contents->has_started());
   prerender_manager()->ClearData(PrerenderManager::CLEAR_PRERENDER_CONTENTS);
   DummyPrerenderContents* null = NULL;
   EXPECT_EQ(null, prerender_manager()->GetEntry(url));
 }
 
 }  // namespace prerender