Moving src/webrtc into src/.

In order to eliminate the WebRTC Subtree mirror in Chromium, 
WebRTC is moving the content of the src/webrtc directory up
to the src/ directory.

NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
TBR=tommi@webrtc.org

Bug: chromium:611808
Change-Id: Iac59c5b51b950f174119565bac87955a7994bc38
Reviewed-on: https://webrtc-review.googlesource.com/1560
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Reviewed-by: Henrik Kjellander <kjellander@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#19845}

rtc_tools/testing/download_apprtc.py

@@ -0,0 +1,58 @@
+#!/usr/bin/env python
+# Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
+#
+# Use of this source code is governed by a BSD-style license
+# that can be found in the LICENSE file in the root of the source
+# 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.
+
+"""Downloads prebuilt AppRTC and Go from WebRTC storage and unpacks it.
+
+Requires that depot_tools is installed and in the PATH.
+
+It downloads compressed files in the directory where the script lives.
+This is because the precondition is that the script lives in the same
+directory of the .sha1 files.
+"""
+
+import os
+import sys
+
+import utils
+
+
+SCRIPT_DIR = os.path.dirname(os.path.abspath(__file__))
+
+
+def _GetGoArchivePathForPlatform():
+  archive_extension = 'zip' if utils.GetPlatform() == 'win' else 'tar.gz'
+  return os.path.join(utils.GetPlatform(), 'go.%s' % archive_extension)
+
+
+def main(argv):
+  if len(argv) > 2:
+    return 'Usage: %s [output_dir]' % argv[0]
+
+  output_dir = os.path.abspath(argv[1]) if len(argv) > 1 else None
+
+  apprtc_zip_path = os.path.join(SCRIPT_DIR, 'prebuilt_apprtc.zip')
+  if os.path.isfile(apprtc_zip_path + '.sha1'):
+    utils.DownloadFilesFromGoogleStorage(SCRIPT_DIR, auto_platform=False)
+
+  if output_dir is not None:
+    utils.RemoveDirectory(os.path.join(output_dir, 'apprtc'))
+    utils.UnpackArchiveTo(apprtc_zip_path, output_dir)
+
+  golang_path = os.path.join(SCRIPT_DIR, 'golang')
+  golang_zip_path = os.path.join(golang_path, _GetGoArchivePathForPlatform())
+  if os.path.isfile(golang_zip_path + '.sha1'):
+    utils.DownloadFilesFromGoogleStorage(golang_path)
+
+  if output_dir is not None:
+    utils.RemoveDirectory(os.path.join(output_dir, 'go'))
+    utils.UnpackArchiveTo(golang_zip_path, output_dir)
+
+
+if __name__ == '__main__':
+  sys.exit(main(sys.argv))