[ChromeDriver] Run Java tests without Ant

Change-Id: Iec38375f55151e73cc3bb72683d1b4ee3cb2b01a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1721852Reviewed-by: John Chen <johnchen@chromium.org>
Commit-Queue: Tatiana Buldina <buldina@chromium.org>
Cr-Commit-Position: refs/heads/master@{#709264}

chrome/test/chromedriver/util.py

@@ -166,10 +166,11 @@ def Kill(pid):
     os.kill(pid, signal.SIGTERM)
 
 
-def RunCommand(cmd, cwd=None):
+def RunCommand(cmd, cwd=None, fileName=None):
   """Runs the given command and returns the exit code.
 
   Args:
+    fileName: file name to redirect output
     cmd: list of command arguments.
     cwd: working directory to execute the command, or None if the current
          working directory should be used.
@@ -178,7 +179,11 @@ def RunCommand(cmd, cwd=None):
     The exit code of the command.
   """
   sys.stdout.flush()
-  process = subprocess.Popen(cmd, cwd=cwd)
+  if fileName is not None:
+    with open(fileName,"wb") as out:
+      process = subprocess.Popen(cmd, cwd=cwd,stdout=out,stderr=out)
+  else:
+    process = subprocess.Popen(cmd, cwd=cwd)
   process.wait()
   sys.stdout.flush()
   return process.returncode