Format python files using yapf

Change-Id: I8b7b97efb6bfdcceef9efc533cdaa0675ab7db40
diff --git a/tools/historic_memory_usage.py b/tools/historic_memory_usage.py
index 3ef2268..a40cf2a 100755
--- a/tools/historic_memory_usage.py
+++ b/tools/historic_memory_usage.py
@@ -20,60 +20,64 @@
 APPS = ['gmscore', 'nest', 'youtube', 'gmail', 'chrome']
 COMPILERS = ['d8', 'r8']
 
+
 def ParseOptions(argv):
-  result = optparse.OptionParser()
-  result.add_option('--compiler',
-                    help='The compiler to use',
-                    default='d8',
-                    choices=COMPILERS)
-  result.add_option('--app',
-                    help='What app to run on',
-                    default='gmail',
-                    choices=APPS)
-  result.add_option('--top',
-                    default=historic_run.top_or_default(),
-                    help='The most recent commit to test')
-  result.add_option('--bottom',
-                    help='The oldest commit to test')
-  result.add_option('--output',
-                    default='build',
-                    help='Directory where to output results')
-  result.add_option('--timeout',
-                    type=int,
-                    default=0,
-                    help='Set timeout instead of waiting for OOM.')
-  return result.parse_args(argv)
+    result = optparse.OptionParser()
+    result.add_option('--compiler',
+                      help='The compiler to use',
+                      default='d8',
+                      choices=COMPILERS)
+    result.add_option('--app',
+                      help='What app to run on',
+                      default='gmail',
+                      choices=APPS)
+    result.add_option('--top',
+                      default=historic_run.top_or_default(),
+                      help='The most recent commit to test')
+    result.add_option('--bottom', help='The oldest commit to test')
+    result.add_option('--output',
+                      default='build',
+                      help='Directory where to output results')
+    result.add_option('--timeout',
+                      type=int,
+                      default=0,
+                      help='Set timeout instead of waiting for OOM.')
+    return result.parse_args(argv)
+
 
 def make_run_on_app_command(options):
-  return lambda commit: run_on_app(options, commit)
+    return lambda commit: run_on_app(options, commit)
+
 
 def run_on_app(options, commit):
-  app = options.app
-  compiler = options.compiler
-  cmd = ['tools/run_on_app.py',
-         '--app', app,
-         '--compiler', compiler,
-         '--timeout', str(options.timeout),
-         '--no-build', '--find-min-xmx']
-  stdout = subprocess.check_output(cmd)
-  output_path = options.output or 'build'
-  time_commit = '%s_%s' % (commit.timestamp, commit.git_hash)
-  time_commit_path = os.path.join(output_path, time_commit)
-  if not os.path.exists(time_commit_path):
-    os.makedirs(time_commit_path)
-  stdout_path = os.path.join(time_commit_path, 'stdout')
-  with open(stdout_path, 'w') as f:
-    f.write(stdout)
-  print('Wrote stdout to: %s' % stdout_path)
+    app = options.app
+    compiler = options.compiler
+    cmd = [
+        'tools/run_on_app.py', '--app', app, '--compiler', compiler,
+        '--timeout',
+        str(options.timeout), '--no-build', '--find-min-xmx'
+    ]
+    stdout = subprocess.check_output(cmd)
+    output_path = options.output or 'build'
+    time_commit = '%s_%s' % (commit.timestamp, commit.git_hash)
+    time_commit_path = os.path.join(output_path, time_commit)
+    if not os.path.exists(time_commit_path):
+        os.makedirs(time_commit_path)
+    stdout_path = os.path.join(time_commit_path, 'stdout')
+    with open(stdout_path, 'w') as f:
+        f.write(stdout)
+    print('Wrote stdout to: %s' % stdout_path)
+
 
 def main(argv):
-  (options, args) = ParseOptions(argv)
-  if not options.app:
-     raise Exception('Please specify an app')
-  top = historic_run.top_or_default(options.top)
-  bottom = historic_run.bottom_or_default(options.bottom)
-  command = make_run_on_app_command(options)
-  historic_run.run(command, top, bottom)
+    (options, args) = ParseOptions(argv)
+    if not options.app:
+        raise Exception('Please specify an app')
+    top = historic_run.top_or_default(options.top)
+    bottom = historic_run.bottom_or_default(options.bottom)
+    command = make_run_on_app_command(options)
+    historic_run.run(command, top, bottom)
+
 
 if __name__ == '__main__':
-  sys.exit(main(sys.argv[1:]))
+    sys.exit(main(sys.argv[1:]))