Plumb iteration info

tools/perf/core/perf_benchmark.py

Index: tools/perf/core/perf_benchmark.py
diff --git a/tools/perf/core/perf_benchmark.py b/tools/perf/core/perf_benchmark.py
index 4158e2d23219bf17eea478976e9230368c9bec6d..23211fff050ff3f4cbf43dd9df98479ad437d072 100644
--- a/tools/perf/core/perf_benchmark.py
+++ b/tools/perf/core/perf_benchmark.py
@@ -24,6 +24,23 @@ class PerfBenchmark(benchmark.Benchmark):
     """ To be overridden by perf benchmarks. """
     pass
 
+  def GetExtraIterationInfo(self):
+    info = {}
+
+    botName = os.environ.get('BUILDBOT_BUILDERNAME')
+    if botName:
+      info['botName'] = botName

[sullivan, 2016/06/10 16:56:57]

Do we need the bot name? The dashboard automatically pulls it from the test
path.

+
+    buildNumber = os.environ.get('BUILDBOT_BUILDNUMBER')
+    if buildNumber:
+      info['buildNumber'] = buildNumber
+
+    revision = os.environ.get('BUILDBOT_REVISION')
+    if revision:
+      info['revision'] = revision
+

[sullivan, 2016/06/10 16:56:57]

These are pulled in via the recipe already.

+    return info
+
   def CustomizeBrowserOptions(self, options):
     # Subclass of PerfBenchmark should override  SetExtraBrowserOptions to add
     # more browser options rather than overriding CustomizeBrowserOptions.