Re-enable the warm perf load test.

chrome/test/startup/feature_startup_test.cc

 // Copyright (c) 2006-2008 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/file_util.h"
 #include "base/gfx/rect.h"
 #include "base/path_service.h"
 #include "base/perftimer.h"
 #include "base/string_util.h"
 #include "base/time.h"
@@ skipping 145 matching lines @@
     PrintTimings("onload", onload_times, false /* important */);
   }
 };
 
 // TODO(pamg): run these tests with a reference build?
 TEST_F(NewTabUIStartupTest, PerfCold) {
   RunStartupTest("tab_cold", false /* cold */, true /* important */,
                  UITest::DEFAULT_THEME);
 }
 
-TEST_F(NewTabUIStartupTest, DISABLED_PerfWarm) {
+TEST_F(NewTabUIStartupTest, PerfWarm) {
   RunStartupTest("tab_warm", true /* warm */, false /* not important */,
                  UITest::DEFAULT_THEME);
 }
 
 TEST_F(NewTabUIStartupTest, ComplexThemeCold) {
   RunStartupTest("tab_complex_theme_cold", false /* cold */,
                  false /* not important */,
                  UITest::COMPLEX_THEME);
 }
 
@@ skipping 15 matching lines @@
 }
 
 TEST_F(NewTabUIStartupTest, NativeFrameGtkThemeCold) {
   RunStartupTest("tab_custom_frame_gtk_theme_cold", false /* cold */,
                  false /* not important */,
                  UITest::CUSTOM_FRAME_NATIVE_THEME);
 }
 #endif
 
 }  // namespace