Use buildername rather than slavename for "bot" with perf dashboard.

scripts/slave/recipe_modules/perf_dashboard/api.py

 # Copyright 2014 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.
 
 import urllib
 
 from recipe_engine import recipe_api
 
 
 class PerfDashboardApi(recipe_api.RecipeApi):
   """Provides steps to take a list of perf points and post them to the
   Chromium Perf Dashboard.  Can also use the test url for testing purposes."""
 
-  def get_skeleton_point(self, test, revision, value):
+  def get_skeleton_point(self, test, revision, value, bot=None):
     # TODO: masterid is really mastername
     assert (test != '')
     assert (revision != '')
     assert (value != '')
     return {
         'master': self.m.properties['mastername'],
-        'bot': self.m.properties['slavename'],
+        'bot': bot or self.m.properties['buildername'],
         'test': test,
         'revision': revision,
         'value': value,
         'masterid': self.m.properties['mastername'],
         'buildername': self.m.properties['buildername'],
         'buildnumber': self.m.properties['buildnumber']
     }
 
   def add_dashboard_link(self, presentation, test, revision, bot=None):
     """Adds a results-dashboard link to the step presentation.
 
     Must be called from a follow-up function of the step, to which the link
     should be added. For a working link, the parameters test, revision and bot
     must match to the parameters used to upload points to the dashboard.
 
     Args:
       presentation: A step presentation object. Can be obtained by
                     step_result.presentation from a followup_fn of a step.
       test: Slash-separated test path.
       revision: The build revision, e.g. got_revision from the update step.
-      bot: The slave name.
+      bot: The bot name used for the data on the perf dashboard.
     """
     assert presentation
     assert test
     assert revision
     params = urllib.urlencode({
         'masters': self.m.properties['mastername'],
-        'bots': bot or self.m.properties['slavename'],
+        'bots': bot or self.m.properties['buildername'],
         'tests': test,
         'rev': revision,
     })
     presentation.links['Results Dashboard'] = ('%s/report?%s' %
                                                (self.c.url, params))
 
   def set_default_config(self):
     """If in golo, use real perf server, otherwise use testing perf server."""
     if self.m.properties.get('use_mirror', True):  # We're on a bot
       self.set_config('production')
@@ skipping 31 matching lines @@
         self.warning(response, reason)
 
   def halt(self, step_result, reason):  # pragma: no cover
     step_result.presentation.step_text = reason
     step_result.presentation.status = self.m.step.FAILURE
     raise self.m.step.StepFailure(reason)
 
   def warning(self, step_result, reason):  # pragma: no cover
     step_result.presentation.step_text = reason
     step_result.presentation.status = self.m.step.WARNING