[Telemetry] Pass test_runner environment in local args instead of a global variable

tools/perf/run_benchmark

Index: tools/perf/run_benchmark
diff --git a/tools/perf/run_benchmark b/tools/perf/run_benchmark
index e077bb62a4d789b3908b4c4f52bef14c0dc08a07..bf56376f937b946cc688e6ff16bad0b88b3b25cf 100755
--- a/tools/perf/run_benchmark
+++ b/tools/perf/run_benchmark
@@ -9,10 +9,12 @@ import sys
 sys.path.append(os.path.join(os.path.dirname(__file__), os.pardir, 'telemetry'))
 
 from telemetry import benchmark_runner
-from telemetry.core import environment
 
 
 if __name__ == '__main__':
-  base_dir = os.path.dirname(os.path.realpath(__file__))
-  benchmark_runner.config = environment.Environment([base_dir])
-  sys.exit(benchmark_runner.main())
+  top_level_dir = os.path.dirname(os.path.realpath(__file__))
+
+  environment = benchmark_runner.Environment(
+      top_level_dir=top_level_dir,
+      benchmark_dirs=[os.path.join(top_level_dir, 'benchmarks')])
+  sys.exit(benchmark_runner.main(environment))