Fix JSON syntax errors in chromium.fyi test specs.

BUG=178409
TBR=phajdan.jr@chromium.org
NOTRY=true

Review URL: https://codereview.chromium.org/311863003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@274539 0039d316-1c4b-4281-b951-d872f2087c98

testing/buildbot/chromium.fyi.json

@@ -210,7 +210,7 @@
     "gtest_tests": [
       "browser_tests"
     ]
-  }
+  },
   "Chromium Linux MSan": {
     "gtest_tests": [
       "base_unittests",
@@ -233,7 +233,7 @@
       "sync_unit_tests",
       "ui_unittests",
       "unit_tests",
-      "url_unittests",
-    ],
-  },
+      "url_unittests"
+    ]
+  }
 }