Switch to TimeDelta interfaces in chrome automation test infrastructure.

chrome/test/perf/tab_switching_test.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/environment.h"
 #include "base/file_path.h"
 #include "base/file_util.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/path_service.h"
@@ skipping 79 matching lines @@
       int tab_count = -1;
       ASSERT_TRUE(browser_proxy_->GetTabCount(&tab_count));
       ASSERT_EQ(initial_tab_count + new_tab_count, tab_count);
 
       // Switch linearly between tabs.
       ASSERT_TRUE(browser_proxy_->ActivateTab(0));
       int final_tab_count = 0;
       ASSERT_TRUE(browser_proxy_->GetTabCount(&final_tab_count));
       for (int j = initial_tab_count; j < final_tab_count; ++j) {
         ASSERT_TRUE(browser_proxy_->ActivateTab(j));
-        ASSERT_TRUE(browser_proxy_->WaitForTabToBecomeActive(j, 10000));
+        ASSERT_TRUE(browser_proxy_->WaitForTabToBecomeActive(
+            j, base::TimeDelta::FromSeconds(10)));
       }
 
       // Close the browser to force a dump of log.
       bool application_closed = false;
       EXPECT_TRUE(CloseBrowser(browser_proxy_.get(), &application_closed));
 
       // Open the corresponding log file and collect average from the
       // histogram stats generated for RenderWidgetHost_TabSwitchPaintDuration.
       bool log_has_been_dumped = false;
       std::string contents;
@@ skipping 80 matching lines @@
   RunTabSwitchingUITest("t", true);
 }
 
 // Started failing with a webkit roll in r49936. See http://crbug.com/46751
 TEST_F(TabSwitchingUITest, FAILS_TabSwitchRef) {
   UseReferenceBuild();
   RunTabSwitchingUITest("t_ref", true);
 }
 
 }  // namespace