Collect tab timing information for use in telementry-based startup tests

chrome/test/ui/ui_test.cc

Index: chrome/test/ui/ui_test.cc
diff --git a/chrome/test/ui/ui_test.cc b/chrome/test/ui/ui_test.cc
index cf59949049e853a68e5f656b29bb2d688ae00399..680be98aa2324c4560d503f349a628c39ddb720c 100644
--- a/chrome/test/ui/ui_test.cc
+++ b/chrome/test/ui/ui_test.cc
@@ -85,6 +85,7 @@ UITestBase::UITestBase()
       homepage_(chrome::kAboutBlankURL),
       wait_for_initial_loads_(true),
       dom_automation_enabled_(false),
+      stats_collection_extension_enabled_(false),
       show_window_(false),
       clear_profile_(true),
       include_testing_id_(true),
@@ -100,6 +101,7 @@ UITestBase::UITestBase(MessageLoop::Type msg_loop_type)
       expected_crashes_(0),
       wait_for_initial_loads_(true),
       dom_automation_enabled_(false),
+      stats_collection_extension_enabled_(false),
       show_window_(false),
       clear_profile_(true),
       include_testing_id_(true),
@@ -189,6 +191,8 @@ void UITestBase::SetLaunchSwitches() {
     launch_arguments_.AppendSwitch(switches::kEnableFileCookies);
   if (dom_automation_enabled_)
     launch_arguments_.AppendSwitch(switches::kDomAutomationController);
+  if (stats_collection_extension_enabled_)
+    launch_arguments_.AppendSwitch(switches::kStatsCollectionExtension);
   // Allow off-store extension installs.
   launch_arguments_.AppendSwitchASCII(
       switches::kEasyOffStoreExtensionInstall, "1");