Rename a conflicting trace.

chrome/test/startup/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/path_service.h"
 #include "base/platform_thread.h"
 #include "base/string_util.h"
 #include "base/test/test_file_util.h"
 #include "base/time.h"
@@ skipping 148 matching lines @@
 // TODO(mpcomplete): Should we have reference timings for all these?
 
 TEST_F(StartupTest, PerfCold) {
   RunStartupTest("cold", "t", true /* cold */, false /* not important */,
                  UITest::DEFAULT_THEME);
 }
 
 TEST_F(StartupTest, PerfExtensionEmpty) {
   SetUpWithFileURL();
   SetUpWithExtensionsProfile("empty");
-  RunStartupTest("warm", "t", false /* cold */, false /* not important */,
+  RunStartupTest("warm", "extension_empty",
+                 false /* cold */, false /* not important */,
                  UITest::DEFAULT_THEME);
 }
 
 TEST_F(StartupTest, PerfExtensionToolstrips1) {
   SetUpWithFileURL();
   SetUpWithExtensionsProfile("toolstrips1");
   RunStartupTest("warm", "extension_toolstrip1",
                  false /* cold */, false /* not important */,
                  UITest::DEFAULT_THEME);
 }
@@ skipping 53 matching lines @@
                  false /* not important */, UITest::CUSTOM_FRAME);
 }
 
 TEST_F(StartupTest, PerfColdNativeFrameGtkTheme) {
   RunStartupTest("warm", "custom-frame-gtk-theme", false /* warm */,
                  false /* not important */, UITest::CUSTOM_FRAME_NATIVE_THEME);
 }
 #endif
 
 }  // namespace