Revert 98132 - Mark PrerenderTrackerNull test as flaky.

chrome/browser/prerender/prerender_tracker_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 <set>
 
 #include "base/logging.h"
 #include "chrome/browser/prerender/prerender_manager.h"
 #include "chrome/browser/prerender/prerender_tracker.h"
 #include "chrome/test/base/testing_browser_process.h"
@@ skipping 60 matching lines @@
  private:
   ScopedTestingBrowserProcess browser_process_;
   MessageLoop message_loop_;
   BrowserThread ui_thread_;
   BrowserThread io_thread_;
 
   scoped_ptr<TestPrerenderManager> prerender_manager_;
 };
 
 // Check that a non-existant RenderView is handled correctly.
-TEST_F(PrerenderTrackerTest, FLAKY_PrerenderTrackerNull) {
+TEST_F(PrerenderTrackerTest, PrerenderTrackerNull) {
   FinalStatus final_status;
   EXPECT_FALSE(prerender_tracker()->TryUse(0, 0));
   EXPECT_FALSE(prerender_tracker()->TryCancel(0, 0, FINAL_STATUS_HTTPS));
   EXPECT_FALSE(prerender_tracker()->TryCancelOnIOThread(
       0, 0, FINAL_STATUS_HTTPS));
   EXPECT_FALSE(prerender_tracker()->IsPrerenderingOnIOThread(0, 0));
   EXPECT_FALSE(prerender_tracker()->GetFinalStatus(0, 0, &final_status));
   EXPECT_FALSE(prerender_manager()->WasPrerenderCancelled(0, 0));
 }
 
@@ skipping 236 matching lines @@
 
   remove_urls.clear();
   remove_urls.push_back(example_url);
   remove_urls.push_back(example_url);
   url_counter.RemoveURLs(remove_urls);
   EXPECT_FALSE(url_counter.MatchesURL(example_url));
   EXPECT_FALSE(url_counter.MatchesURL(gmail_url));
 }
 
 }  // namespace prerender