Bug 1626089 - Run two wpt processes in CI, r=jmaher

This runs wpt with --processes=2 in CI, excluding wdspec tests where this
causes obvious test failures and android where we can't have more than a
single instance. This should provide some speedup at the cost of possibly
increased instability. So following landing this it will be necessary to
look out for an increased rate of intermittents.

Differential Revision: https://phabricator.services.mozilla.com/D68885

--HG--
extra : moz-landing-system : lando

testing/mozharness/configs/web_platform_tests/prod_config.py

@@ -14,7 +14,6 @@ ADJUST_MOUSE_AND_SCREEN = False
 config = {
     "options": [
         "--prefs-root=%(test_path)s/prefs",
-        "--processes=1",
         "--config=%(test_path)s/wptrunner.ini",
         "--ca-cert-path=%(test_path)s/tests/tools/certs/cacert.pem",
         "--host-key-path=%(test_path)s/tests/tools/certs/web-platform.test.key",

testing/mozharness/configs/web_platform_tests/prod_config_android.py

@@ -8,7 +8,6 @@ import os
 config = {
     "options": [
         "--prefs-root=%(test_path)s/prefs",
-        "--processes=1",
         "--config=%(test_path)s/wptrunner.ini",
         "--ca-cert-path=%(test_path)s/tests/tools/certs/cacert.pem",
         "--host-key-path=%(test_path)s/tests/tools/certs/web-platform.test.key",

testing/mozharness/configs/web_platform_tests/prod_config_mac.py

@@ -14,7 +14,6 @@ ADJUST_MOUSE_AND_SCREEN = False
 config = {
     "options": [
         "--prefs-root=%(test_path)s/prefs",
-        "--processes=1",
         "--config=%(test_path)s/wptrunner.ini",
         "--ca-cert-path=%(test_path)s/tests/tools/certs/cacert.pem",
         "--host-key-path=%(test_path)s/tests/tools/certs/web-platform.test.key",

testing/mozharness/configs/web_platform_tests/prod_config_windows.py

@@ -18,7 +18,6 @@ ADJUST_MOUSE_AND_SCREEN = True
 config = {
     "options": [
         "--prefs-root=%(test_path)s/prefs",
-        "--processes=1",
         "--config=%(test_path)s/wptrunner.ini",
         "--ca-cert-path=%(test_path)s/tests/tools/certs/cacert.pem",
         "--host-key-path=%(test_path)s/tests/tools/certs/web-platform.test.key",

testing/mozharness/configs/web_platform_tests/prod_config_windows_taskcluster.py

@@ -28,7 +28,6 @@ TASKBAR_AUTOHIDE_REG_PATH = {
 config = {
     "options": [
         "--prefs-root=%(test_path)s/prefs",
-        "--processes=1",
         "--config=%(test_path)s/wptrunner.ini",
         "--ca-cert-path=%(test_path)s/tests/tools/certs/cacert.pem",
         "--host-key-path=%(test_path)s/tests/tools/certs/web-platform.test.key",

testing/mozharness/configs/web_platform_tests/test_config.py

@@ -7,7 +7,6 @@
 config = {
     "options": [
         "--prefs-root=%(test_path)s/prefs",
-        "--processes=1",
         "--config=%(test_path)s/wptrunner.ini",
         "--ca-cert-path=%(test_path)s/tests/tools/certs/cacert.pem",
         "--host-key-path=%(test_path)s/tests/tools/certs/web-platform.test.key",

testing/mozharness/configs/web_platform_tests/test_config_windows.py

@@ -9,7 +9,6 @@ import sys
 config = {
     "options": [
         "--prefs-root=%(test_path)s/prefs",
-        "--processes=1",
         "--config=%(test_path)s/wptrunner.ini",
         "--ca-cert-path=%(test_path)s/tests/tools/certs/cacert.pem",
         "--host-key-path=%(test_path)s/tests/tools/certs/web-platform.test.key",

testing/mozharness/scripts/web_platform_tests.py

@@ -226,6 +226,12 @@ class WebPlatformTest(TestingMixin, MercurialScript, CodeCoverageMixin, AndroidM
                 "--instrument-to-file=%s" % os.path.join(dirs["abs_blob_upload_dir"],
                                                          "wpt_instruments.txt")]
 
+        if self.is_android or "wdspec" in test_types:
+            processes = 1
+        else:
+            processes = 2
+        cmd.append("--processes=%s" % processes)
+
         if self.is_android:
             cmd += ["--device-serial=%s" % self.device_serial,
                     "--package-name=%s" % self.query_package_name()]