Update documentation for new perf bisect command.

tools/bisect-perf-regression.py

Index: tools/bisect-perf-regression.py
diff --git a/tools/bisect-perf-regression.py b/tools/bisect-perf-regression.py
index 54695594d8ba568b7ac57fa15020a2de8e1374c6..3ed81719fe73ad02281af0bcd16341ec1e28cfd5 100755
--- a/tools/bisect-perf-regression.py
+++ b/tools/bisect-perf-regression.py
@@ -235,6 +235,15 @@ committed locally to run-perf-test.cfg.
 For more details please visit
 https://sites.google.com/a/chromium.org/dev/developers/performance-try-bots"""
 
+REPRO_STEPS_TRYJOB_TELEMETRY = """
+To reproduce on a performance try bot:
+%(command)s
+(Where <bot-name> comes from tools/perf/run_benchmark --browser=list)

[tonyg, 2014/08/27 16:38:59]

I think an important thing to do here is to give them the bot name rather than
asking them to find it. We already know exactly which bot this bisect ran on and
the problem we've had in the past is that authors didn't understand that the
regression was platform specific, thus leading to confusion like in
https://docs.google.com/a/google.com/document/d/1GpQI97nMsye57o6JNLyFSpvzY0fL...

[sullivan, 2014/08/27 22:02:49]

I'm really sorry this got committed without addressing your comment. Feel free
to revert while I am on vacation.

I agree it would be much better to print the name of the bisect bot. But I
wasn't able to find the name.

There is the function GetBuilderNameAndBuildTime(), but it looks like it returns
the builder, not the tryserver.

There is builder_host, but I think that is an http hostname and not the
buildername, right?

Prasad, Tony, any ideas how I can get the tryserver name, e.g.
mac_10_9_perf_bisect?

+
+For more details please visit
+https://sites.google.com/a/chromium.org/dev/developers/performance-try-bots
+"""
+
 RESULTS_THANKYOU = """
 ===== THANK YOU FOR CHOOSING BISECT AIRLINES =====
 Visit http://www.chromium.org/developers/core-principles for Chrome's policy
@@ -2725,7 +2734,13 @@ class BisectPerformanceMetrics(object):
       command += ('\nAlso consider passing --profiler=list to see available '
                   'profilers.')
     print REPRO_STEPS_LOCAL % {'command': command}
-    print REPRO_STEPS_TRYJOB % {'command': command}
+    if bisect_utils.IsTelemetryCommand(self.opts.command):
+      telemetry_command = re.sub(r'--browser=[^\s]+',
+                                 '--browser=<bot-name>',
+                                 command)
+      print REPRO_STEPS_TRYJOB_TELEMETRY % {'command': telemetry_command}
+    else:
+      print REPRO_STEPS_TRYJOB % {'command': command}
 
   def _PrintOtherRegressions(self, other_regressions, revision_data):
     """Prints a section of the results about other potential regressions."""