Add yapf python formatter and format all files

yapf seems widely used in chromium. Adding here and
formatting all existing sources.

Change-Id: I5fd223a46cf3a00e6b7e6266850825b484af1558
diff --git a/tools/heap_profile b/tools/heap_profile
index 5680a68..d705914 100755
--- a/tools/heap_profile
+++ b/tools/heap_profile
@@ -31,17 +31,16 @@
 import urllib
 
 TRACE_TO_TEXT_SHAS = {
-  'linux': '74cb40d9413d7ad756e327e09e46a8adde90db92',
-  'mac': '47045bc6abd4f9113969211f37fdd2259b0c1cc3',
+    'linux': '74cb40d9413d7ad756e327e09e46a8adde90db92',
+    'mac': '47045bc6abd4f9113969211f37fdd2259b0c1cc3',
 }
 TRACE_TO_TEXT_PATH = tempfile.gettempdir()
-TRACE_TO_TEXT_BASE_URL = (
-    'https://storage.googleapis.com/perfetto/')
+TRACE_TO_TEXT_BASE_URL = ('https://storage.googleapis.com/perfetto/')
 
 NULL = open(os.devnull)
 NOOUT = {
-  'stdout': NULL,
-  'stderr': NULL,
+    'stdout': NULL,
+    'stderr': NULL,
 }
 
 
@@ -71,16 +70,16 @@
   os.chmod(local_file, 0o755)
   return local_file
 
-PACKAGES_LIST_CFG='''data_sources {
+
+PACKAGES_LIST_CFG = '''data_sources {
   config {
     name: "android.packages_list"
   }
 }
 '''
 
-
 CFG_IDENT = '      '
-CFG='''buffers {{
+CFG = '''buffers {{
   size_kb: 32768
 }}
 
@@ -109,10 +108,12 @@
       }}
 """
 
-PERFETTO_CMD=('CFG=\'{cfg}\'; echo ${{CFG}} | '
-              'perfetto --txt -c - -o '
-              '/data/misc/perfetto-traces/profile-{user} -d')
+PERFETTO_CMD = ('CFG=\'{cfg}\'; echo ${{CFG}} | '
+                'perfetto --txt -c - -o '
+                '/data/misc/perfetto-traces/profile-{user} -d')
 IS_INTERRUPTED = False
+
+
 def sigint_handler(sig, frame):
   global IS_INTERRUPTED
   IS_INTERRUPTED = True
@@ -120,59 +121,107 @@
 
 def main(argv):
   parser = argparse.ArgumentParser()
-  parser.add_argument("-i", "--interval", help="Sampling interval. "
-                      "Default 4096 (4KiB)", type=int, default=4096)
-  parser.add_argument("-d", "--duration", help="Duration of profile (ms). "
-                      "Default 7 days.", type=int, default=604800000)
-  parser.add_argument("--no-start", help="Do not start heapprofd.",
-                      action='store_true')
-  parser.add_argument("-p", "--pid", help="Comma-separated list of PIDs to "
-                      "profile.", metavar="PIDS")
-  parser.add_argument("-n", "--name", help="Comma-separated list of process "
-                      "names to profile.", metavar="NAMES")
-  parser.add_argument("-c", "--continuous-dump",
-                      help="Dump interval in ms. 0 to disable continuous dump.",
-                      type=int, default=0)
-  parser.add_argument("--disable-selinux", action="store_true",
-                      help="Disable SELinux enforcement for duration of "
-                      "profile.")
-  parser.add_argument("--no-versions", action="store_true",
-                      help="Do not get version information about APKs.")
-  parser.add_argument("--no-running", action="store_true",
-                      help="Do not target already running processes.")
-  parser.add_argument("--no-startup", action="store_true",
-                      help="Do not target processes that start during "
-                      "the profile.")
-  parser.add_argument("--shmem-size", help="Size of buffer between client and "
-                      "heapprofd. Default 8MiB. Needs to be a power of two "
-                      "multiple of 4096, at least 8192.", type=int,
-                      default=8 * 1048576)
-  parser.add_argument("--block-client", help="When buffer is full, block the "
-                      "client to wait for buffer space. Use with caution as "
-                      "this can significantly slow down the client. "
-                      "This is the default", action="store_true")
-  parser.add_argument("--no-block-client", help="When buffer is full, stop the "
-                      "profile early.", action="store_true")
-  parser.add_argument("--idle-allocations", help="Keep track of how many "
-                      "bytes were unused since the last dump, per "
-                      "callstack", action="store_true")
-  parser.add_argument("--dump-at-max", help="Dump the maximum memory usage"
-                      "rather than at the time of the dump.",
-                      action="store_true")
-  parser.add_argument("--simpleperf", action="store_true",
-                      help="Get simpleperf profile of heapprofd. This is "
-                      "only for heapprofd development.")
-  parser.add_argument("--trace-to-text-binary",
-                      help="Path to local trace to text. For debugging.")
-  parser.add_argument("--print-config", action="store_true",
-                      help="Print config instead of running. For debugging.")
+  parser.add_argument(
+      "-i",
+      "--interval",
+      help="Sampling interval. "
+      "Default 4096 (4KiB)",
+      type=int,
+      default=4096)
+  parser.add_argument(
+      "-d",
+      "--duration",
+      help="Duration of profile (ms). "
+      "Default 7 days.",
+      type=int,
+      default=604800000)
+  parser.add_argument(
+      "--no-start", help="Do not start heapprofd.", action='store_true')
+  parser.add_argument(
+      "-p",
+      "--pid",
+      help="Comma-separated list of PIDs to "
+      "profile.",
+      metavar="PIDS")
+  parser.add_argument(
+      "-n",
+      "--name",
+      help="Comma-separated list of process "
+      "names to profile.",
+      metavar="NAMES")
+  parser.add_argument(
+      "-c",
+      "--continuous-dump",
+      help="Dump interval in ms. 0 to disable continuous dump.",
+      type=int,
+      default=0)
+  parser.add_argument(
+      "--disable-selinux",
+      action="store_true",
+      help="Disable SELinux enforcement for duration of "
+      "profile.")
+  parser.add_argument(
+      "--no-versions",
+      action="store_true",
+      help="Do not get version information about APKs.")
+  parser.add_argument(
+      "--no-running",
+      action="store_true",
+      help="Do not target already running processes.")
+  parser.add_argument(
+      "--no-startup",
+      action="store_true",
+      help="Do not target processes that start during "
+      "the profile.")
+  parser.add_argument(
+      "--shmem-size",
+      help="Size of buffer between client and "
+      "heapprofd. Default 8MiB. Needs to be a power of two "
+      "multiple of 4096, at least 8192.",
+      type=int,
+      default=8 * 1048576)
+  parser.add_argument(
+      "--block-client",
+      help="When buffer is full, block the "
+      "client to wait for buffer space. Use with caution as "
+      "this can significantly slow down the client. "
+      "This is the default",
+      action="store_true")
+  parser.add_argument(
+      "--no-block-client",
+      help="When buffer is full, stop the "
+      "profile early.",
+      action="store_true")
+  parser.add_argument(
+      "--idle-allocations",
+      help="Keep track of how many "
+      "bytes were unused since the last dump, per "
+      "callstack",
+      action="store_true")
+  parser.add_argument(
+      "--dump-at-max",
+      help="Dump the maximum memory usage"
+      "rather than at the time of the dump.",
+      action="store_true")
+  parser.add_argument(
+      "--simpleperf",
+      action="store_true",
+      help="Get simpleperf profile of heapprofd. This is "
+      "only for heapprofd development.")
+  parser.add_argument(
+      "--trace-to-text-binary",
+      help="Path to local trace to text. For debugging.")
+  parser.add_argument(
+      "--print-config",
+      action="store_true",
+      help="Print config instead of running. For debugging.")
 
   args = parser.parse_args()
 
   fail = False
   if args.block_client and args.no_block_client:
-    print("FATAL: Both block-client and no-block-client given.",
-            file=sys.stderr)
+    print(
+        "FATAL: Both block-client and no-block-client given.", file=sys.stderr)
     fail = True
   if args.pid is None and args.name is None:
     print("FATAL: Neither PID nor NAME given.", file=sys.stderr)
@@ -237,10 +286,12 @@
   if args.continuous_dump:
     continuous_dump_cfg = CONTINUOUS_DUMP.format(
         dump_interval=args.continuous_dump)
-  cfg = CFG.format(interval=args.interval,
-                   duration=args.duration, target_cfg=target_cfg,
-                   continuous_dump_cfg=continuous_dump_cfg,
-                   shmem_size=args.shmem_size)
+  cfg = CFG.format(
+      interval=args.interval,
+      duration=args.duration,
+      target_cfg=target_cfg,
+      continuous_dump_cfg=continuous_dump_cfg,
+      shmem_size=args.shmem_size)
   if not args.no_versions:
     cfg += PACKAGES_LIST_CFG
 
@@ -250,7 +301,8 @@
 
   if args.disable_selinux:
     enforcing = subprocess.check_output(['adb', 'shell', 'getenforce'])
-    atexit.register(subprocess.check_call,
+    atexit.register(
+        subprocess.check_call,
         ['adb', 'shell', 'su root setenforce %s' % enforcing])
     subprocess.check_call(['adb', 'shell', 'su root setenforce 0'])
 
@@ -261,25 +313,25 @@
       subprocess.check_call(
           ['adb', 'shell', 'setprop persist.heapprofd.enable 1'])
       atexit.register(subprocess.check_call,
-          ['adb', 'shell', 'setprop persist.heapprofd.enable 0'])
+                      ['adb', 'shell', 'setprop persist.heapprofd.enable 0'])
 
   user = subprocess.check_output(['adb', 'shell', 'whoami']).strip()
 
   if args.simpleperf:
-    subprocess.check_call(
-        ['adb', 'shell',
-         'mkdir -p /data/local/tmp/heapprofd_profile && '
-         'cd /data/local/tmp/heapprofd_profile &&'
-         '(nohup simpleperf record -g -p $(pidof heapprofd) 2>&1 &) '
-         '> /dev/null'])
+    subprocess.check_call([
+        'adb', 'shell', 'mkdir -p /data/local/tmp/heapprofd_profile && '
+        'cd /data/local/tmp/heapprofd_profile &&'
+        '(nohup simpleperf record -g -p $(pidof heapprofd) 2>&1 &) '
+        '> /dev/null'
+    ])
 
   perfetto_pid = subprocess.check_output(
-      ['adb', 'exec-out', PERFETTO_CMD.format(cfg=cfg, user=user)]).strip()
+      ['adb', 'exec-out',
+       PERFETTO_CMD.format(cfg=cfg, user=user)]).strip()
   try:
     int(perfetto_pid.strip())
   except ValueError:
-    print("Failed to invoke perfetto: {}".format(perfetto_pid),
-          file=sys.stderr)
+    print("Failed to invoke perfetto: {}".format(perfetto_pid), file=sys.stderr)
     return 1
 
   old_handler = signal.signal(signal.SIGINT, sigint_handler)
@@ -289,8 +341,7 @@
   device_connected = True
   while not device_connected or (exists and not IS_INTERRUPTED):
     exists = subprocess.call(
-        ['adb', 'shell', '[ -d /proc/{} ]'.format(perfetto_pid)],
-        **NOOUT) == 0
+        ['adb', 'shell', '[ -d /proc/{} ]'.format(perfetto_pid)], **NOOUT) == 0
     device_connected = subprocess.call(['adb', 'shell', 'true'], **NOOUT) == 0
     time.sleep(1)
   signal.signal(signal.SIGINT, old_handler)
@@ -301,11 +352,10 @@
     subprocess.check_call(['adb', 'shell', 'killall', '-INT', 'simpleperf'])
     print("Waiting for simpleperf to exit.")
     while subprocess.call(
-        ['adb', 'shell', '[ -f /proc/$(pidof simpleperf)/exe ]'],
-        **NOOUT) == 0:
+        ['adb', 'shell', '[ -f /proc/$(pidof simpleperf)/exe ]'], **NOOUT) == 0:
       time.sleep(1)
-    subprocess.check_call(['adb', 'pull', '/data/local/tmp/heapprofd_profile',
-                           '/tmp'])
+    subprocess.check_call(
+        ['adb', 'pull', '/data/local/tmp/heapprofd_profile', '/tmp'])
     print("Pulled simpleperf profile to /tmp/heapprofd_profile")
 
   # Wait for perfetto cmd to return.
@@ -314,9 +364,11 @@
         ['adb', 'shell', '[ -d /proc/{} ]'.format(perfetto_pid)]) == 0
     time.sleep(1)
 
-  subprocess.check_call(['adb', 'pull',
-                         '/data/misc/perfetto-traces/profile-{}'.format(user),
-                         '/tmp/profile'], stdout=NULL)
+  subprocess.check_call([
+      'adb', 'pull', '/data/misc/perfetto-traces/profile-{}'.format(user),
+      '/tmp/profile'
+  ],
+                        stdout=NULL)
   trace_to_text_output = subprocess.check_output(
       [trace_to_text_binary, 'profile', '/tmp/profile'])
   profile_path = None
@@ -335,11 +387,12 @@
           file=sys.stderr)
     return 1
 
-  subprocess.check_call(['gzip'] + [os.path.join(profile_path, x) for x in
-                                    os.listdir(profile_path)])
+  subprocess.check_call(
+      ['gzip'] +
+      [os.path.join(profile_path, x) for x in os.listdir(profile_path)])
 
-  symlink_path = os.path.join(os.path.dirname(profile_path),
-                                        "heap_profile-latest")
+  symlink_path = os.path.join(
+      os.path.dirname(profile_path), "heap_profile-latest")
   if os.path.lexists(symlink_path):
     os.unlink(symlink_path)
   os.symlink(profile_path, symlink_path)