Let run_tests.py just stream output (#18534)

shell/platform/android/BUILD.gn

@@ -463,7 +463,7 @@ action("robolectric_tests") {
                         embedding_jar_path,
                       ] + embedding_dependencies_jars
 
-  inputs = _jar_dependencies
+  inputs = _jar_dependencies + additional_jar_files
 
   _rebased_current_path = rebase_path(".")
   _rebased_jar_path = rebase_path(jar_path, root_build_dir)

testing/run_tests.py

@@ -38,14 +38,10 @@ def RunCmd(cmd, **kwargs):
   print 'Running command "%s"' % command_string
 
   start_time = time.time()
-  process = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.STDOUT, **kwargs)
-  (output, _) = process.communicate()
+  process = subprocess.Popen(cmd, stdout=sys.stdout, stderr=sys.stderr, **kwargs)
+  process.communicate()
   end_time = time.time()
 
-  # Print the result no matter what.
-  for line in output.splitlines():
-    print line
-
   if process.returncode != 0:
     PrintDivider('!')
     raise Exception('Command "%s" exited with code %d' % (command_string, process.returncode))