Fix undefined behavior in UnixDomainSocketUtil.Connect test.

testing/buildbot/chromium.fyi.json

Index: testing/buildbot/chromium.fyi.json
diff --git a/testing/buildbot/chromium.fyi.json b/testing/buildbot/chromium.fyi.json
index 092f20a84790796bab836d56a7b6afffb5fed8df..184d4fcaaabab531a123eee28a1bb27f63e38216 100644
--- a/testing/buildbot/chromium.fyi.json
+++ b/testing/buildbot/chromium.fyi.json
@@ -4455,6 +4455,12 @@
         "swarming": {
           "can_use_on_swarming_builders": true
         },
+        "test": "ipc_tests"
+      },
+      {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "jingle_unittests"
       },
       {
@@ -12596,6 +12602,12 @@
         "swarming": {
           "can_use_on_swarming_builders": true
         },
+        "test": "ipc_tests"
+      },
+      {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "jingle_unittests"
       },
       {