Bug 1602832 - P2: Create 'socketprocess_networking' test variant r=ahal

Differential Revision: https://phabricator.services.mozilla.com/D58112

taskcluster/ci/config.yml

@@ -89,6 +89,7 @@ treeherder:
         'X': 'Xpcshell tests'
         'X-1proc': 'Xpcshell tests, without e10s'
         'X-fis': 'Xpcshell tests with fission enabled'
+        'X-spi-nw': 'Xpcshell tests with networking on socket process'
         'L10n': 'Localised Repacks'
         'L10n-Rpk': 'Localized Repackaged Repacks'
         'BM': 'Beetmover'

taskcluster/ci/test/xpcshell.yml

@@ -6,7 +6,7 @@ job-defaults:
     suite: xpcshell
     variants:
         by-test-platform:
-            linux1804-64/debug: ['fission']
+            linux1804-64/debug: ['fission', 'socketprocess_networking']
             default: ['fission']
     target:
         by-test-platform:

taskcluster/taskgraph/transforms/tests.py

@@ -206,6 +206,19 @@ TEST_VARIANTS = {
                 ],
             }
         }
+    },
+    'socketprocess_networking': {
+        'description': "{description} with networking on socket process enabled",
+        'suffix': 'spi-nw',
+        'merge': {
+            'mozharness': {
+                'extra-options': [
+                    '--setpref=network.process.enabled=true',
+                    '--setpref=network.http.network_access_on_socket_process.enabled=true',
+                    '--setpref=network.ssl_tokens_cache_enabled=true',
+                ],
+            }
+        }
     }
 }
 
@@ -1304,7 +1317,7 @@ def ensure_spi_disabled_on_all_but_spi(config, tasks):
                        'junit' not in task['suite'] and
                        'raptor' not in task['suite'])
 
-        if has_setpref and variant != 'socketprocess':
+        if has_setpref and variant != 'socketprocess' and variant != 'socketprocess_networking':
             task['mozharness']['extra-options'].append(
                     '--setpref=media.peerconnection.mtransport_process=false')
             task['mozharness']['extra-options'].append(