Add release notes query parameters to logs.

Bug: 1091050

Change-Id: Ie7f4320f2234f223851dfcaae71a14babbe88efd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2230776Reviewed-by: Yulun Wu <yulunwu@chromium.org>
Reviewed-by: Elly Fong-Jones <ellyjones@chromium.org>
Commit-Queue: Yulun Wu <yulunwu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#776138}

chrome/browser/ui/chrome_pages.cc

@@ -141,6 +141,7 @@ const std::string BuildQueryString(Profile* profile) {
   const std::string query_string = base::StrCat(
       {kChromeReleaseNotesURL, "?version=", milestone, "&tags=", board_name,
        ",", region, ",", language, ",", channel_name, ",", user_type});
+  VLOG(LOG_INFO) << "Release Notes Query String: " << query_string;
   return query_string;
 }