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}
diff --git a/tools_webrtc/ios/build_ios_libs.py b/tools_webrtc/ios/build_ios_libs.py
index b0d28c0..3833383 100755
--- a/tools_webrtc/ios/build_ios_libs.py
+++ b/tools_webrtc/ios/build_ios_libs.py
@@ -7,7 +7,6 @@
 # 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.
-
 """WebRTC iOS FAT libraries build script.
 Each architecture is compiled separately before being merged together.
 By default, the library is created in out_ios_libs/. (Change with -o.)
@@ -21,7 +20,6 @@
 import subprocess
 import sys
 
-
 os.environ['PATH'] = '/usr/libexec' + os.pathsep + os.environ['PATH']
 
 SCRIPT_DIR = os.path.dirname(os.path.abspath(__file__))
@@ -41,198 +39,235 @@
 
 
 def _ParseArgs():
-  parser = argparse.ArgumentParser(description=__doc__)
-  parser.add_argument('--build_config', default='release',
-      choices=['debug', 'release'],
-      help='The build config. Can be "debug" or "release". '
-           'Defaults to "release".')
-  parser.add_argument('--arch', nargs='+', default=DEFAULT_ARCHS,
-      choices=ENABLED_ARCHS,
-      help='Architectures to build. Defaults to %(default)s.')
-  parser.add_argument('-c', '--clean', action='store_true', default=False,
-      help='Removes the previously generated build output, if any.')
-  parser.add_argument('-p', '--purify', action='store_true', default=False,
-      help='Purifies the previously generated build output by '
-           'removing the temporary results used when (re)building.')
-  parser.add_argument('-o', '--output-dir', default=SDK_OUTPUT_DIR,
-      help='Specifies a directory to output the build artifacts to. '
-           'If specified together with -c, deletes the dir.')
-  parser.add_argument('-r', '--revision', type=int, default=0,
-      help='Specifies a revision number to embed if building the framework.')
-  parser.add_argument('-e', '--bitcode', action='store_true', default=False,
-      help='Compile with bitcode.')
-  parser.add_argument('--verbose', action='store_true', default=False,
-      help='Debug logging.')
-  parser.add_argument('--use-goma', action='store_true', default=False,
-      help='Use goma to build.')
-  parser.add_argument('--extra-gn-args', default=[], nargs='*',
-      help='Additional GN args to be used during Ninja generation.')
+    parser = argparse.ArgumentParser(description=__doc__)
+    parser.add_argument('--build_config',
+                        default='release',
+                        choices=['debug', 'release'],
+                        help='The build config. Can be "debug" or "release". '
+                        'Defaults to "release".')
+    parser.add_argument(
+        '--arch',
+        nargs='+',
+        default=DEFAULT_ARCHS,
+        choices=ENABLED_ARCHS,
+        help='Architectures to build. Defaults to %(default)s.')
+    parser.add_argument(
+        '-c',
+        '--clean',
+        action='store_true',
+        default=False,
+        help='Removes the previously generated build output, if any.')
+    parser.add_argument(
+        '-p',
+        '--purify',
+        action='store_true',
+        default=False,
+        help='Purifies the previously generated build output by '
+        'removing the temporary results used when (re)building.')
+    parser.add_argument(
+        '-o',
+        '--output-dir',
+        default=SDK_OUTPUT_DIR,
+        help='Specifies a directory to output the build artifacts to. '
+        'If specified together with -c, deletes the dir.')
+    parser.add_argument(
+        '-r',
+        '--revision',
+        type=int,
+        default=0,
+        help='Specifies a revision number to embed if building the framework.')
+    parser.add_argument('-e',
+                        '--bitcode',
+                        action='store_true',
+                        default=False,
+                        help='Compile with bitcode.')
+    parser.add_argument('--verbose',
+                        action='store_true',
+                        default=False,
+                        help='Debug logging.')
+    parser.add_argument('--use-goma',
+                        action='store_true',
+                        default=False,
+                        help='Use goma to build.')
+    parser.add_argument(
+        '--extra-gn-args',
+        default=[],
+        nargs='*',
+        help='Additional GN args to be used during Ninja generation.')
 
-  return parser.parse_args()
+    return parser.parse_args()
 
 
 def _RunCommand(cmd):
-  logging.debug('Running: %r', cmd)
-  subprocess.check_call(cmd, cwd=SRC_DIR)
+    logging.debug('Running: %r', cmd)
+    subprocess.check_call(cmd, cwd=SRC_DIR)
 
 
 def _CleanArtifacts(output_dir):
-  if os.path.isdir(output_dir):
-    logging.info('Deleting %s', output_dir)
-    shutil.rmtree(output_dir)
+    if os.path.isdir(output_dir):
+        logging.info('Deleting %s', output_dir)
+        shutil.rmtree(output_dir)
 
 
 def _CleanTemporary(output_dir, architectures):
-  if os.path.isdir(output_dir):
-    logging.info('Removing temporary build files.')
-    for arch in architectures:
-      arch_lib_path = os.path.join(output_dir, arch + '_libs')
-      if os.path.isdir(arch_lib_path):
-        shutil.rmtree(arch_lib_path)
+    if os.path.isdir(output_dir):
+        logging.info('Removing temporary build files.')
+        for arch in architectures:
+            arch_lib_path = os.path.join(output_dir, arch + '_libs')
+            if os.path.isdir(arch_lib_path):
+                shutil.rmtree(arch_lib_path)
 
 
 def BuildWebRTC(output_dir, target_arch, flavor, gn_target_name,
-                ios_deployment_target, libvpx_build_vp9, use_bitcode,
-                use_goma, extra_gn_args):
-  output_dir = os.path.join(output_dir, target_arch + '_libs')
-  gn_args = ['target_os="ios"', 'ios_enable_code_signing=false',
-             'use_xcode_clang=true', 'is_component_build=false']
+                ios_deployment_target, libvpx_build_vp9, use_bitcode, use_goma,
+                extra_gn_args):
+    output_dir = os.path.join(output_dir, target_arch + '_libs')
+    gn_args = [
+        'target_os="ios"', 'ios_enable_code_signing=false',
+        'use_xcode_clang=true', 'is_component_build=false'
+    ]
 
-  # Add flavor option.
-  if flavor == 'debug':
-    gn_args.append('is_debug=true')
-  elif flavor == 'release':
-    gn_args.append('is_debug=false')
-  else:
-    raise ValueError('Unexpected flavor type: %s' % flavor)
+    # Add flavor option.
+    if flavor == 'debug':
+        gn_args.append('is_debug=true')
+    elif flavor == 'release':
+        gn_args.append('is_debug=false')
+    else:
+        raise ValueError('Unexpected flavor type: %s' % flavor)
 
-  gn_args.append('target_cpu="%s"' % target_arch)
+    gn_args.append('target_cpu="%s"' % target_arch)
 
-  gn_args.append('ios_deployment_target="%s"' % ios_deployment_target)
+    gn_args.append('ios_deployment_target="%s"' % ios_deployment_target)
 
-  gn_args.append('rtc_libvpx_build_vp9=' +
-                 ('true' if libvpx_build_vp9 else 'false'))
+    gn_args.append('rtc_libvpx_build_vp9=' +
+                   ('true' if libvpx_build_vp9 else 'false'))
 
-  gn_args.append('enable_ios_bitcode=' +
-                 ('true' if use_bitcode else 'false'))
-  gn_args.append('use_goma=' + ('true' if use_goma else 'false'))
+    gn_args.append('enable_ios_bitcode=' +
+                   ('true' if use_bitcode else 'false'))
+    gn_args.append('use_goma=' + ('true' if use_goma else 'false'))
 
-  args_string = ' '.join(gn_args + extra_gn_args)
-  logging.info('Building WebRTC with args: %s', args_string)
+    args_string = ' '.join(gn_args + extra_gn_args)
+    logging.info('Building WebRTC with args: %s', args_string)
 
-  cmd = [
-    sys.executable,
-    os.path.join(find_depot_tools.DEPOT_TOOLS_PATH, 'gn.py'),
-    'gen',
-    output_dir,
-    '--args=' + args_string,
-  ]
-  _RunCommand(cmd)
-  logging.info('Building target: %s', gn_target_name)
+    cmd = [
+        sys.executable,
+        os.path.join(find_depot_tools.DEPOT_TOOLS_PATH, 'gn.py'),
+        'gen',
+        output_dir,
+        '--args=' + args_string,
+    ]
+    _RunCommand(cmd)
+    logging.info('Building target: %s', gn_target_name)
 
-  cmd = [
-    os.path.join(find_depot_tools.DEPOT_TOOLS_PATH, 'ninja'),
-    '-C',
-    output_dir,
-    gn_target_name,
-  ]
-  if use_goma:
-    cmd.extend(['-j', '200'])
-  _RunCommand(cmd)
+    cmd = [
+        os.path.join(find_depot_tools.DEPOT_TOOLS_PATH, 'ninja'),
+        '-C',
+        output_dir,
+        gn_target_name,
+    ]
+    if use_goma:
+        cmd.extend(['-j', '200'])
+    _RunCommand(cmd)
+
 
 def main():
-  args = _ParseArgs()
+    args = _ParseArgs()
 
-  logging.basicConfig(level=logging.DEBUG if args.verbose else logging.INFO)
+    logging.basicConfig(level=logging.DEBUG if args.verbose else logging.INFO)
 
-  if args.clean:
-    _CleanArtifacts(args.output_dir)
-    return 0
+    if args.clean:
+        _CleanArtifacts(args.output_dir)
+        return 0
 
-  architectures = list(args.arch)
-  gn_args = args.extra_gn_args
+    architectures = list(args.arch)
+    gn_args = args.extra_gn_args
 
-  if args.purify:
-    _CleanTemporary(args.output_dir, architectures)
-    return 0
+    if args.purify:
+        _CleanTemporary(args.output_dir, architectures)
+        return 0
 
-  gn_target_name = 'framework_objc'
-  if not args.bitcode:
-    gn_args.append('enable_dsyms=true')
-  gn_args.append('enable_stripping=true')
+    gn_target_name = 'framework_objc'
+    if not args.bitcode:
+        gn_args.append('enable_dsyms=true')
+    gn_args.append('enable_stripping=true')
 
+    # Build all architectures.
+    for arch in architectures:
+        BuildWebRTC(args.output_dir, arch, args.build_config, gn_target_name,
+                    IOS_DEPLOYMENT_TARGET, LIBVPX_BUILD_VP9, args.bitcode,
+                    args.use_goma, gn_args)
 
-  # Build all architectures.
-  for arch in architectures:
-    BuildWebRTC(args.output_dir, arch, args.build_config, gn_target_name,
-                IOS_DEPLOYMENT_TARGET, LIBVPX_BUILD_VP9, args.bitcode,
-                args.use_goma, gn_args)
+    # Create FAT archive.
+    lib_paths = [
+        os.path.join(args.output_dir, arch + '_libs') for arch in architectures
+    ]
 
-  # Create FAT archive.
-  lib_paths = [os.path.join(args.output_dir, arch + '_libs')
-                for arch in architectures]
-
-  # Combine the slices.
-  dylib_path = os.path.join(SDK_FRAMEWORK_NAME, 'WebRTC')
-  # Dylibs will be combined, all other files are the same across archs.
-  # Use distutils instead of shutil to support merging folders.
-  distutils.dir_util.copy_tree(
-      os.path.join(lib_paths[0], SDK_FRAMEWORK_NAME),
-      os.path.join(args.output_dir, SDK_FRAMEWORK_NAME))
-  logging.info('Merging framework slices.')
-  dylib_paths = [os.path.join(path, dylib_path) for path in lib_paths]
-  out_dylib_path = os.path.join(args.output_dir, dylib_path)
-  try:
-    os.remove(out_dylib_path)
-  except OSError:
-    pass
-  cmd = ['lipo'] + dylib_paths + ['-create', '-output', out_dylib_path]
-  _RunCommand(cmd)
-
-  # Merge the dSYM slices.
-  lib_dsym_dir_path = os.path.join(lib_paths[0], 'WebRTC.dSYM')
-  if os.path.isdir(lib_dsym_dir_path):
-    distutils.dir_util.copy_tree(lib_dsym_dir_path,
-                                  os.path.join(args.output_dir, 'WebRTC.dSYM'))
-    logging.info('Merging dSYM slices.')
-    dsym_path = os.path.join('WebRTC.dSYM', 'Contents', 'Resources', 'DWARF',
-                              'WebRTC')
-    lib_dsym_paths = [os.path.join(path, dsym_path) for path in lib_paths]
-    out_dsym_path = os.path.join(args.output_dir, dsym_path)
-    try:
-      os.remove(out_dsym_path)
-    except OSError:
-      pass
-    cmd = ['lipo'] + lib_dsym_paths + ['-create', '-output', out_dsym_path]
-    _RunCommand(cmd)
-
-    # Generate the license file.
-    ninja_dirs = [os.path.join(args.output_dir, arch + '_libs')
-                  for arch in architectures]
-    gn_target_full_name = '//sdk:' + gn_target_name
-    builder = LicenseBuilder(ninja_dirs, [gn_target_full_name])
-    builder.GenerateLicenseText(
+    # Combine the slices.
+    dylib_path = os.path.join(SDK_FRAMEWORK_NAME, 'WebRTC')
+    # Dylibs will be combined, all other files are the same across archs.
+    # Use distutils instead of shutil to support merging folders.
+    distutils.dir_util.copy_tree(
+        os.path.join(lib_paths[0], SDK_FRAMEWORK_NAME),
         os.path.join(args.output_dir, SDK_FRAMEWORK_NAME))
-
-
-    # Modify the version number.
-    # Format should be <Branch cut MXX>.<Hotfix #>.<Rev #>.
-    # e.g. 55.0.14986 means branch cut 55, no hotfixes, and revision 14986.
-    infoplist_path = os.path.join(args.output_dir, SDK_FRAMEWORK_NAME,
-                                  'Info.plist')
-    cmd = ['PlistBuddy', '-c',
-           'Print :CFBundleShortVersionString', infoplist_path]
-    major_minor = subprocess.check_output(cmd).strip()
-    version_number = '%s.%s' % (major_minor, args.revision)
-    logging.info('Substituting revision number: %s', version_number)
-    cmd = ['PlistBuddy', '-c',
-           'Set :CFBundleVersion ' + version_number, infoplist_path]
+    logging.info('Merging framework slices.')
+    dylib_paths = [os.path.join(path, dylib_path) for path in lib_paths]
+    out_dylib_path = os.path.join(args.output_dir, dylib_path)
+    try:
+        os.remove(out_dylib_path)
+    except OSError:
+        pass
+    cmd = ['lipo'] + dylib_paths + ['-create', '-output', out_dylib_path]
     _RunCommand(cmd)
-    _RunCommand(['plutil', '-convert', 'binary1', infoplist_path])
 
-  logging.info('Done.')
-  return 0
+    # Merge the dSYM slices.
+    lib_dsym_dir_path = os.path.join(lib_paths[0], 'WebRTC.dSYM')
+    if os.path.isdir(lib_dsym_dir_path):
+        distutils.dir_util.copy_tree(
+            lib_dsym_dir_path, os.path.join(args.output_dir, 'WebRTC.dSYM'))
+        logging.info('Merging dSYM slices.')
+        dsym_path = os.path.join('WebRTC.dSYM', 'Contents', 'Resources',
+                                 'DWARF', 'WebRTC')
+        lib_dsym_paths = [os.path.join(path, dsym_path) for path in lib_paths]
+        out_dsym_path = os.path.join(args.output_dir, dsym_path)
+        try:
+            os.remove(out_dsym_path)
+        except OSError:
+            pass
+        cmd = ['lipo'] + lib_dsym_paths + ['-create', '-output', out_dsym_path]
+        _RunCommand(cmd)
+
+        # Generate the license file.
+        ninja_dirs = [
+            os.path.join(args.output_dir, arch + '_libs')
+            for arch in architectures
+        ]
+        gn_target_full_name = '//sdk:' + gn_target_name
+        builder = LicenseBuilder(ninja_dirs, [gn_target_full_name])
+        builder.GenerateLicenseText(
+            os.path.join(args.output_dir, SDK_FRAMEWORK_NAME))
+
+        # Modify the version number.
+        # Format should be <Branch cut MXX>.<Hotfix #>.<Rev #>.
+        # e.g. 55.0.14986 means branch cut 55, no hotfixes, and revision 14986.
+        infoplist_path = os.path.join(args.output_dir, SDK_FRAMEWORK_NAME,
+                                      'Info.plist')
+        cmd = [
+            'PlistBuddy', '-c', 'Print :CFBundleShortVersionString',
+            infoplist_path
+        ]
+        major_minor = subprocess.check_output(cmd).strip()
+        version_number = '%s.%s' % (major_minor, args.revision)
+        logging.info('Substituting revision number: %s', version_number)
+        cmd = [
+            'PlistBuddy', '-c', 'Set :CFBundleVersion ' + version_number,
+            infoplist_path
+        ]
+        _RunCommand(cmd)
+        _RunCommand(['plutil', '-convert', 'binary1', infoplist_path])
+
+    logging.info('Done.')
+    return 0
 
 
 if __name__ == '__main__':
-  sys.exit(main())
+    sys.exit(main())