Add pywebsocket3 to DEPS

This commit updates DEPS file to add pywebsocket3 to //third_party.

Change-Id: I41a402d7d640f365712e93db01dbd85618fe082e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2059041Reviewed-by: Adam Rice <ricea@chromium.org>
Reviewed-by: Yutaka Hirano <yhirano@chromium.org>
Reviewed-by: Nico Weber <thakis@chromium.org>
Reviewed-by: Alex Gough <ajgo@chromium.org>
Commit-Queue: Keita Suzuki <suzukikeita@google.com>
Cr-Commit-Position: refs/heads/master@{#747094}

DEPS

@@ -1280,6 +1280,9 @@ deps = {
   'src/third_party/pywebsocket/src':
     Var('chromium_git') + '/external/github.com/google/pywebsocket.git' + '@' + '2d7b73c3acbd0f41dcab487ae5c97c6feae06ce2',
 
+  'src/third_party/pywebsocket3/src':
+    Var('chromium_git') + '/external/github.com/GoogleChromeLabs/pywebsocket3.git' + '@' + '89c9228434100e4dabb19f61d0d4f55625940638',
+
   'src/third_party/qemu-linux-arm64': {
       'packages': [
           {

third_party/.gitignore

@@ -188,7 +188,7 @@
 /python_24
 /python_26
 /pywebsocket/src
-/pywebsocket/src
+/pywebsocket3/src
 /qemu-linux-arm64
 /qemu-linux-x64
 /qemu-mac-x64

third_party/pywebsocket3/BUILD.gn

+# Copyright 2020 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.
+
+# pwebsocket is a Python program. Depend on this to get the data deps necessary
+# to run it in the test environment.
+group("pywebsocket") {
+  # For now, depend on the mod_pywebsocket directory.
+  data = [ "//third_party/pywebsocket3/src/mod_pywebsocket/" ]
+}

third_party/pywebsocket3/OWNERS

+ricea@chromium.org
+yhirano@chromium.org
+
+# TEAM: blink-network-dev@chromium.org
+# COMPONENT: Blink>Network>WebSockets

third_party/pywebsocket3/README.chromium

+Name: pywebsocket3
+Short Name: pywebsocket3
+URL: https://github.com/GoogleChromeLabs/pywebsocket3/
+Version: 0
+License: New BSD
+License File: src/LICENSE
+Security Critical: no
+
+Description:
+pywebsocket3 is a WebSocket server which is intended for testing.
+Chromium uses it for WebSocket related tests on Extensions, PPAPI, and so on.
+
+Local Modifications:
+Many chromium developers join pywebsocket3 development.
+If you need some local modifications, please contact them directly.
+They will check your change in pywebsocket repository.