For #21700: Added option to open in browser instead of automatically doing it

app/benchmark.gradle

@@ -72,6 +72,10 @@ ext.maybeConfigForJetpackBenchmark = { android ->
                 // We set the the output directory simply for simplicity since the benchmark_runner.py script
                 // can't know the name of the phone in the /build/outputs/ directory. The system defaults to
                 // {phone_name} which can be troublesome finding in some case.
+
+                //NOTE: Jetpack Benchmark outputs to Logcat too. However, the output in the logcat is
+                //the min of the several repeats, for more statistics. Therefore, to get more stats,
+                //we refer to the JSON file.
                 additionalTestOutputDir : '/storage/emulated/0/benchmark'
         ]
     }

tools/run_benchmark.py

@@ -21,7 +21,8 @@ def parse_args():
     parser = argparse.ArgumentParser(description=DESCRIPTION)
     parser.add_argument("--class_to_test",
                         help="Path to the class to test. Format it as 'org.mozilla.fenix.[path_to_benchmark_test")
-
+     parser.add_argument("--open_file_in_browser",
+                            help="Open the JSON file in the browser once the tests are done.")
     return parser.parse_args()
 
 
@@ -49,7 +50,8 @@ def main():
     args = parse_args()
     run_benchmark(args.class_to_test)
     fetch_benchmark_results()
-    open_in_browser()
+    if args.open_file_in_browser:
+        open_in_browser()
 
 
 if __name__ == '__main__':