[tools/perf] Add benchmarks to the experiment

The following benchmarks are added:
- jetstream2, uses the new AddMeasurement API
- octane, uses the old AddHistogram API (but values are also recorded
  as histograms)
- blink_perf.css, a non-press benchmark also using AddMeasurement.

output formats for these will now be handled by results processor.

Bug: 981349
Change-Id: I08c3cf9c878a32389fa81912020922ff652593f0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1863293Reviewed-by: Juan Antonio Navarro Pérez <perezju@chromium.org>
Commit-Queue: Mikhail Khokhlov <khokhlov@google.com>
Cr-Commit-Position: refs/heads/master@{#706059}

tools/perf/core/results_processor/command_line.py

@@ -132,14 +132,15 @@ def ProcessOptions(options, standalone=False):
     chosen_formats = ['html']
 
   # The following is a temporary hack to switch on native handling of output
-  # formats for two benchmarks. This is an experiment to make sure
+  # formats for several benchmarks. This is an experiment to make sure
   # that Results Processor is ready to handle output on all platforms.
   # TODO(crbug.com/981349): Remove this after experiment is finished (i.e.
   # all formats are considered HANDLED_NATIVELY).
   force_native = False
   if 'positional_args' in options.__dict__ and options.positional_args:
     benchmark_name = options.positional_args[0]
-    if benchmark_name in ['power.desktop', 'startup.mobile']:
+    if benchmark_name in ['power.desktop', 'startup.mobile', 'jetstream2',
+                          'octane', 'blink_perf.css']:
       force_native = True
       logging.warning('Force native handling of output formats for %s',
                       benchmark_name)