Bug 1139904 - Add initial test runtime files for mochitest browser-chrome and devtools, r=jmaher

testing/runtimes/README.md

@@ -0,0 +1,11 @@
+Test Runtimes
+=============
+
+These files contain test runtimes for various suites across different platforms. Each JSON file
+corresponds to a single test job in production and has the following format:
+
+    { '<test id>': <average runtime> }
+
+These files are being used to normalize chunk durations so all chunks take roughly the same length
+of time. They are still experimental and their format and/or file structure are subject to change
+without notice.

testing/runtimes/moz.build

@@ -0,0 +1,9 @@
+# -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+TEST_HARNESS_FILES.testing.mochitest.runtimes += [
+    '**/mochitest-*.runtimes.json',
+]

toolkit/toolkit.mozbuild

@@ -185,6 +185,7 @@ if CONFIG['ENABLE_TESTS']:
         '/testing/profiles',
         '/testing/mozbase',
         '/testing/modules',
+        '/testing/runtimes',
         '/testing/web-platform',
     ]