Reformat python files checked by pylint (part 1/2).

After recently changing .pylintrc (see [1]) we discovered that
the presubmit check always checks all the python files when just
one python file gets updated.

This CL moves all these files one step closer to what the linter
wants.

Autogenerated with:

# Added all the files under pylint control to ~/Desktop/to-reformat
cat ~/Desktop/to-reformat | xargs sed -i '1i\\'
git cl format --python --full

This is part 1 out of 2. The second part will fix function names and
will not be automated.

[1] - https://webrtc-review.googlesource.com/c/src/+/186664

No-Presubmit: True
Bug: webrtc:12114
Change-Id: Idfec4d759f209a2090440d0af2413a1ddc01b841
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/190980
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#32530}

rtc_tools/testing/utils.py

@@ -6,7 +6,6 @@
 # tree. An additional intellectual property rights grant can be found
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
-
 """Utilities for all our deps-management stuff."""
 
 from __future__ import absolute_import
@@ -23,36 +22,37 @@ import zipfile
 
 
 def RunSubprocessWithRetry(cmd):
-  """Invokes the subprocess and backs off exponentially on fail."""
-  for i in range(5):
-    try:
-      subprocess.check_call(cmd)
-      return
-    except subprocess.CalledProcessError as exception:
-      backoff = pow(2, i)
-      print('Got %s, retrying in %d seconds...' % (exception, backoff))
-      time.sleep(backoff)
+    """Invokes the subprocess and backs off exponentially on fail."""
+    for i in range(5):
+        try:
+            subprocess.check_call(cmd)
+            return
+        except subprocess.CalledProcessError as exception:
+            backoff = pow(2, i)
+            print('Got %s, retrying in %d seconds...' % (exception, backoff))
+            time.sleep(backoff)
 
-  print('Giving up.')
-  raise exception
+    print('Giving up.')
+    raise exception
 
 
 def DownloadFilesFromGoogleStorage(path, auto_platform=True):
-  print('Downloading files in %s...' % path)
+    print('Downloading files in %s...' % path)
 
-  extension = 'bat' if 'win32' in sys.platform else 'py'
-  cmd = ['download_from_google_storage.%s' % extension,
-         '--bucket=chromium-webrtc-resources',
-         '--directory', path]
-  if auto_platform:
-    cmd += ['--auto_platform', '--recursive']
-  subprocess.check_call(cmd)
+    extension = 'bat' if 'win32' in sys.platform else 'py'
+    cmd = [
+        'download_from_google_storage.%s' % extension,
+        '--bucket=chromium-webrtc-resources', '--directory', path
+    ]
+    if auto_platform:
+        cmd += ['--auto_platform', '--recursive']
+    subprocess.check_call(cmd)
 
 
 # Code partially copied from
 # https://cs.chromium.org#chromium/build/scripts/common/chromium_utils.py
 def RemoveDirectory(*path):
-  """Recursively removes a directory, even if it's marked read-only.
+    """Recursively removes a directory, even if it's marked read-only.
 
   Remove the directory located at *path, if it exists.
 
@@ -67,62 +67,63 @@ def RemoveDirectory(*path):
   bit and try again, so we do that too.  It's hand-waving, but sometimes it
   works. :/
   """
-  file_path = os.path.join(*path)
-  print('Deleting `{}`.'.format(file_path))
-  if not os.path.exists(file_path):
-    print('`{}` does not exist.'.format(file_path))
-    return
+    file_path = os.path.join(*path)
+    print('Deleting `{}`.'.format(file_path))
+    if not os.path.exists(file_path):
+        print('`{}` does not exist.'.format(file_path))
+        return
 
-  if sys.platform == 'win32':
-    # Give up and use cmd.exe's rd command.
-    file_path = os.path.normcase(file_path)
-    for _ in range(3):
-      print('RemoveDirectory running %s' % (' '.join(
-          ['cmd.exe', '/c', 'rd', '/q', '/s', file_path])))
-      if not subprocess.call(['cmd.exe', '/c', 'rd', '/q', '/s', file_path]):
-        break
-      print('  Failed')
-      time.sleep(3)
-    return
-  else:
-    shutil.rmtree(file_path, ignore_errors=True)
+    if sys.platform == 'win32':
+        # Give up and use cmd.exe's rd command.
+        file_path = os.path.normcase(file_path)
+        for _ in range(3):
+            print('RemoveDirectory running %s' %
+                  (' '.join(['cmd.exe', '/c', 'rd', '/q', '/s', file_path])))
+            if not subprocess.call(
+                ['cmd.exe', '/c', 'rd', '/q', '/s', file_path]):
+                break
+            print('  Failed')
+            time.sleep(3)
+        return
+    else:
+        shutil.rmtree(file_path, ignore_errors=True)
 
 
 def UnpackArchiveTo(archive_path, output_dir):
-  extension = os.path.splitext(archive_path)[1]
-  if extension == '.zip':
-    _UnzipArchiveTo(archive_path, output_dir)
-  else:
-    _UntarArchiveTo(archive_path, output_dir)
+    extension = os.path.splitext(archive_path)[1]
+    if extension == '.zip':
+        _UnzipArchiveTo(archive_path, output_dir)
+    else:
+        _UntarArchiveTo(archive_path, output_dir)
 
 
 def _UnzipArchiveTo(archive_path, output_dir):
-  print('Unzipping {} in {}.'.format(archive_path, output_dir))
-  zip_file = zipfile.ZipFile(archive_path)
-  try:
-    zip_file.extractall(output_dir)
-  finally:
-    zip_file.close()
+    print('Unzipping {} in {}.'.format(archive_path, output_dir))
+    zip_file = zipfile.ZipFile(archive_path)
+    try:
+        zip_file.extractall(output_dir)
+    finally:
+        zip_file.close()
 
 
 def _UntarArchiveTo(archive_path, output_dir):
-  print('Untarring {} in {}.'.format(archive_path, output_dir))
-  tar_file = tarfile.open(archive_path, 'r:gz')
-  try:
-    tar_file.extractall(output_dir)
-  finally:
-    tar_file.close()
+    print('Untarring {} in {}.'.format(archive_path, output_dir))
+    tar_file = tarfile.open(archive_path, 'r:gz')
+    try:
+        tar_file.extractall(output_dir)
+    finally:
+        tar_file.close()
 
 
 def GetPlatform():
-  if sys.platform.startswith('win'):
-    return 'win'
-  if sys.platform.startswith('linux'):
-    return 'linux'
-  if sys.platform.startswith('darwin'):
-    return 'mac'
-  raise Exception("Can't run on platform %s." % sys.platform)
+    if sys.platform.startswith('win'):
+        return 'win'
+    if sys.platform.startswith('linux'):
+        return 'linux'
+    if sys.platform.startswith('darwin'):
+        return 'mac'
+    raise Exception("Can't run on platform %s." % sys.platform)
 
 
 def GetExecutableExtension():
-  return '.exe' if GetPlatform() == 'win' else ''
+    return '.exe' if GetPlatform() == 'win' else ''