Adding a Endure regression test to catch gmail memory issues (crbug.com/345702).

tools/perf/benchmarks/endure.py

Index: tools/perf/benchmarks/endure.py
===================================================================
--- tools/perf/benchmarks/endure.py	(revision 253614)
+++ tools/perf/benchmarks/endure.py	(working copy)
@@ -16,6 +16,7 @@
       'perf_stats_interval': '100s'
   }
 
+
 class EndureCalendarForwardBackward(_EndureBenchmark):
   page_set = 'page_sets/calendar_forward_backward.json'
 
@@ -47,3 +48,14 @@
 class EndurePlusAltPostsPhotos(_EndureBenchmark):
   page_set = 'page_sets/plus_alt_posts_photos.json'
 
+
+class EndureGmailRefresh(test.Test):
+  test = endure.Endure
+  # Options for endure gmail page refresh benchmark test.
+  options = {
+      'skip_navigate_on_repeat': True,
+      'page_repeat_iters': 20,
+      'perf_stats_interval': '1'
+  }
+  page_set = 'page_sets/endure_gmail_refresh.json'
+