diff -r 000000000000 -r 6474c204b198 media/webrtc/trunk/tools/gyp/PRESUBMIT.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/media/webrtc/trunk/tools/gyp/PRESUBMIT.py	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,109 @@
+# Copyright (c) 2012 Google Inc. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+
+"""Top-level presubmit script for GYP.
+
+See http://dev.chromium.org/developers/how-tos/depottools/presubmit-scripts
+for more details about the presubmit API built into gcl.
+"""
+
+
+PYLINT_BLACKLIST = [
+    # TODO: fix me.
+    # From SCons, not done in google style.
+    'test/lib/TestCmd.py',
+    'test/lib/TestCommon.py',
+    'test/lib/TestGyp.py',
+    # Needs style fix.
+    'pylib/gyp/generator/scons.py',
+    'pylib/gyp/generator/xcode.py',
+]
+
+
+PYLINT_DISABLED_WARNINGS = [
+    # TODO: fix me.
+    # Many tests include modules they don't use.
+    'W0611',
+    # Include order doesn't properly include local files?
+    'F0401',
+    # Some use of built-in names.
+    'W0622',
+    # Some unused variables.
+    'W0612',
+    # Operator not preceded/followed by space.
+    'C0323',
+    'C0322',
+    # Unnecessary semicolon.
+    'W0301',
+    # Unused argument.
+    'W0613',
+    # String has no effect (docstring in wrong place).
+    'W0105',
+    # Comma not followed by space.
+    'C0324',
+    # Access to a protected member.
+    'W0212',
+    # Bad indent.
+    'W0311',
+    # Line too long.
+    'C0301',
+    # Undefined variable.
+    'E0602',
+    # Not exception type specified.
+    'W0702',
+    # No member of that name.
+    'E1101',
+    # Dangerous default {}.
+    'W0102',
+    # Others, too many to sort.
+    'W0201', 'W0232', 'E1103', 'W0621', 'W0108', 'W0223', 'W0231',
+    'R0201', 'E0101', 'C0321',
+    # ************* Module copy
+    # W0104:427,12:_test.odict.__setitem__: Statement seems to have no effect
+    'W0104',
+]
+
+
+def CheckChangeOnUpload(input_api, output_api):
+  report = []
+  report.extend(input_api.canned_checks.PanProjectChecks(
+      input_api, output_api))
+  return report
+
+
+def CheckChangeOnCommit(input_api, output_api):
+  report = []
+  license = (
+      r'.*? Copyright \(c\) %(year)s Google Inc\. All rights reserved\.\n'
+      r'.*? Use of this source code is governed by a BSD-style license that '
+        r'can be\n'
+      r'.*? found in the LICENSE file\.\n'
+  ) % {
+      'year': input_api.time.strftime('%Y'),
+  }
+
+  report.extend(input_api.canned_checks.PanProjectChecks(
+      input_api, output_api, license_header=license))
+  report.extend(input_api.canned_checks.CheckTreeIsOpen(
+      input_api, output_api,
+      'http://gyp-status.appspot.com/status',
+      'http://gyp-status.appspot.com/current'))
+
+  import sys
+  old_sys_path = sys.path
+  try:
+    sys.path = ['pylib', 'test/lib'] + sys.path
+    report.extend(input_api.canned_checks.RunPylint(
+        input_api,
+        output_api,
+        black_list=PYLINT_BLACKLIST,
+        disabled_warnings=PYLINT_DISABLED_WARNINGS))
+  finally:
+    sys.path = old_sys_path
+  return report
+
+
+def GetPreferredTrySlaves():
+  return ['gyp-win32', 'gyp-win64', 'gyp-linux', 'gyp-mac']