Add missing comma in GetSomeChromeUnfriendlyRules()

Bug: 1114873
Change-Id: Ie2a30e03680172546052c00b83e8f10bf1be0dce
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2346974
Commit-Queue: Arthur Eubanks <aeubanks@google.com>
Reviewed-by: Charlie Harrison <csharrison@chromium.org>
Cr-Commit-Position: refs/heads/master@{#796901}

components/subresource_filter/tools/ruleset_converter/rule_stream_unittest.cc

@@ -46,7 +46,7 @@ std::vector<std::string> GetSomeRules() {
 std::vector<std::string> GetSomeChromeUnfriendlyRules() {
   return std::vector<std::string>{
       "/a[0-9].com/$image",
-      "a.com$image,popup"
+      "a.com$image,popup",
       "a.com$popup",
       "a.com$~image",
       "a.com$~popup",