Only use new login flow for GmailSmoothPage

tools/perf/page_sets/top_pages.py

Index: tools/perf/page_sets/top_pages.py
diff --git a/tools/perf/page_sets/top_pages.py b/tools/perf/page_sets/top_pages.py
index 2bee2699e535fcf12ebe512d491e2f6167497e8f..7f0d187b3d427b74e1b6d6e1a8b5456302c69484 100644
--- a/tools/perf/page_sets/top_pages.py
+++ b/tools/perf/page_sets/top_pages.py
@@ -4,8 +4,6 @@
 from telemetry.page import page as page_module
 from telemetry.page import shared_page_state
 
-from page_sets.login_helpers import google_login
-
 
 class TopPages(page_module.Page):
 
@@ -56,16 +54,14 @@ class GmailPage(TopPages):
     super(GmailPage, self).__init__(
         url='https://mail.google.com/mail/',
         page_set=page_set,
+        credentials='google',
         shared_page_state_class=shared_page_state_class)
 
   def RunNavigateSteps(self, action_runner):
-    google_login.LoginGoogleAccount(action_runner, 'google3',
-                                    self.credentials_path)
     super(GmailPage, self).RunNavigateSteps(action_runner)
     action_runner.WaitForJavaScriptCondition(
         'window.gmonkey !== undefined &&'
-        'document.getElementById("gb") !== null',
-        timeout_in_seconds=120)
+        'document.getElementById("gb") !== null')
 
 
 class GoogleCalendarPage(TopPages):