Crosperf checks for file /usr/local/telemetry/src/tools/perf/page_sets/page_cycler_story.py which does not exist on older releases and crashes.

Sample image:
  build: elm-release/R53-8506.0.0



OUTPUT: DutWorker[dut="172.17.210.171", label="GN_image"] started working on BenchmarkRun[name="GN_image: graphics_WebGLAquarium (1)"]
OUTPUT: GN_image: graphics_WebGLAquarium (1): No cache hit.

OUTPUT: ==============================
OUTPUT: Thread Status: 
1 active threads, 0 finished threads.
  Active threads:
    Worker thread "172.17.210.171", label="GN_image", benchmark_run=1, reimage=1, now executing BenchmarkRun[name="GN_image: graphics_WebGLAquarium (1)"]
RUNNING:  1 ('GN_image: graphics_WebGLAquarium (1)' 0:00:01)
PENDING:  1 
  GYP_image: graphics_WebGLAquarium [1]

OUTPUT: ==============================
FATAL: Could not find /usr/local/telemetry/src/tools/perf/page_sets/page_cycler_story.py on machine: 172.17.210.171
  File "/usr/lib/python2.7/threading.py", line 783, in __bootstrap
    self.__bootstrap_inner()

  File "/usr/lib/python2.7/threading.py", line 810, in __bootstrap_inner
    self.run()

  File "/usr/local/google/home/manojgupta/crosperf/toolchain-utils/crosperf/schedv2.py", line 87, in run
    self._execute_benchmark_run(br)

  File "/usr/local/google/home/manojgupta/crosperf/toolchain-utils/crosperf/schedv2.py", line 144, in _execute_benchmark_run
    br.run()

  File "/usr/local/google/home/manojgupta/crosperf/toolchain-utils/crosperf/benchmark_run.py", line 108, in run
    self.result = self.RunTest(self.machine)

  File "/usr/local/google/home/manojgupta/crosperf/toolchain-utils/crosperf/benchmark_run.py", line 210, in RunTest
    self.profiler_args)

  File "/usr/local/google/home/manojgupta/crosperf/toolchain-utils/crosperf/suite_runner.py", line 61, in Run
    self.DecreaseWaitTime(machine, label.chromeos_root)

  File "/usr/local/google/home/manojgupta/crosperf/toolchain-utils/crosperf/suite_runner.py", line 141, in DecreaseWaitTime
    FILE, machine_name))

  File "/usr/local/google/home/manojgupta/crosperf/toolchain-utils/cros_utils/logger.py", line 174, in LogFatalIf
    self.LogFatal(msg)

  File "/usr/local/google/home/manojgupta/crosperf/toolchain-utils/cros_utils/logger.py", line 157, in LogFatal
    '\n'.join(traceback.format_stack()))
OUTPUT: DutWorker[dut="172.17.210.171", label="GN_image"] finished.