Add field trial to extend prerender expiration to 5 minutes.

chrome/browser/prerender/prerender_manager_unittest.cc

 // 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.
 
 #include "base/command_line.h"
 #include "base/memory/scoped_vector.h"
 #include "base/message_loop.h"
 #include "base/time.h"
 #include "chrome/browser/prerender/prerender_contents.h"
 #include "chrome/browser/prerender/prerender_manager.h"
@@ skipping 274 matching lines @@
 TEST_F(PrerenderManagerTest, ExpireTest) {
   GURL url("http://www.google.com/");
   DummyPrerenderContents* prerender_contents =
       prerender_manager()->CreateNextPrerenderContents(
           url,
           FINAL_STATUS_TIMED_OUT);
   DummyPrerenderContents* null = NULL;
   EXPECT_TRUE(prerender_manager()->AddSimplePrerender(url));
   EXPECT_EQ(null, prerender_manager()->next_prerender_contents());
   EXPECT_TRUE(prerender_contents->has_started());
-  prerender_manager()->AdvanceTime(prerender_manager()->config().max_age
-                                   + base::TimeDelta::FromSeconds(1));
+  prerender_manager()->AdvanceTime(prerender_manager()->GetMaxAge() +
+                                   base::TimeDelta::FromSeconds(1));
   ASSERT_EQ(null, prerender_manager()->GetEntry(url));
 }
 
 // LRU Test.  Make sure that if we prerender more than one request, that
 // the oldest one will be dropped.
 TEST_F(PrerenderManagerTest, DropOldestRequestTest) {
   GURL url("http://www.google.com/");
   DummyPrerenderContents* prerender_contents =
       prerender_manager()->CreateNextPrerenderContents(
           url,
@@ skipping 279 matching lines @@
       prerender_manager()->CreateNextPrerenderContents(
           url, ORIGIN_LINK_REL_PRERENDER, FINAL_STATUS_MANAGER_SHUTDOWN);
   EXPECT_TRUE(prerender_manager()->AddSimplePrerender(url));
   EXPECT_TRUE(prerender_contents->has_started());
   prerender_manager()->CancelOmniboxPrerenders();
   const DummyPrerenderContents* null = NULL;
   EXPECT_NE(null, prerender_manager()->FindEntry(url));
 }
 
 }  // namespace prerender