WebRTC: Add fetch recipes to depot_tools.

recipes/webrtc.py

+# Copyright (c) 2014 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import sys
+
+import recipe_util  # pylint: disable=F0401
+
+
+# This class doesn't need an __init__ method, so we disable the warning
+# pylint: disable=W0232
+class WebRTC(recipe_util.Recipe):
+  """Basic Recipe class for WebRTC."""
+
+  @staticmethod
+  def fetch_spec(props):
+    url = 'https://chromium.googlesource.com/external/webrtc.git'
+    spec = {
+      'solutions': [
+        {
+          'name': 'src',
+          'url': url,
+          'deps_file': 'DEPS',
+          'managed': False,
+          'custom_deps': {},
+          'safesync_url': '',
+        },
+      ],
+      'auto': True,  # Runs git auto-svn as a part of the fetch.
+    }
+
+    if props.get('target_os'):
+      spec['target_os'] = props['target_os'].split(',')
+
+    return {
+      'type': 'gclient_git_svn',
+      'gclient_git_svn_spec': spec,
+    }
+
+  @staticmethod
+  def expected_root(_props):
+    return 'src'
+
+
+def main(argv=None):
+  return WebRTC().handle_args(argv)
+
+
+if __name__ == '__main__':
+  sys.exit(main(sys.argv))