Add Safari to the list of browsers we test on a regular basis.

tools/testing/perf_testing/create_graph.py

Index: tools/testing/perf_testing/create_graph.py
===================================================================
--- tools/testing/perf_testing/create_graph.py	(revision 2354)
+++ tools/testing/perf_testing/create_graph.py	(working copy)
@@ -135,7 +135,7 @@
   if not PERFBOT_MODE:
     # Only Firefox (and Chrome, but we have Dump Render Tree) works in Linux
     return ['ff']
-  browsers = ['ff', 'chrome']
+  browsers = ['ff', 'chrome', 'safari']
   if platform.system() == 'Windows':
     browsers += ['ie']
   return browsers
@@ -180,7 +180,8 @@
     self.result_folder_name = result_folder_name
     # cur_time is used as a timestamp of when this performance test was run.
     self.cur_time = str(time.mktime(datetime.datetime.now().timetuple()))
-    self.browser_color = {'chrome': 'green', 'ie': 'blue', 'ff': 'red'}
+    self.browser_color = {'chrome': 'green', 'ie': 'blue', 'ff': 'red',
+        'safari':'black'}
     self.values_list = values_list
     self.platform_list = platform_list
     self.revision_dict = dict()
@@ -696,7 +697,7 @@
       help = 'Run this script forever, always checking for the next svn '
       'checkin', action = 'store_true', default = False)
   parser.add_option('--perfbot', '-p', dest = 'perfbot',
-      help = "Run in perfbot mode. (Generate plots, and remove trace files)", 
+      help = "Run in perfbot mode. (Generate plots, and keep trace files)", 
       action = 'store_true', default = False)
   parser.add_option('--verbose', '-v', dest = 'verbose',
       help = 'Print extra debug output', action = 'store_true', default = False)