Revert of Remove webrtc/tools

webrtc/tools/compare_videos.py

+#!/usr/bin/env python
+# Copyright (c) 2013 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.
+
+import os
+
+# This is just a forwarding script during the transition of renaming tools to
+# rtc_tools. To avoid breaking Chromium tests.
+
+SCRIPT_DIR = os.path.dirname(os.path.abspath(__file__))
+RTC_TOOLS_DIR = os.path.abspath(os.path.join(SCRIPT_DIR, os.pardir,
+                                             'rtc_tools'))
+os.system(os.path.join(RTC_TOOLS_DIR, 'compare_videos.py'))