Remove whitespace in the <ping> element closing tag in the comp updater.

components/update_client/update_checker.cc

Index: components/update_client/update_checker.cc
diff --git a/components/update_client/update_checker.cc b/components/update_client/update_checker.cc
index c1cf4d7fce8dded3a25452e2829cc1cfbbadefeb..010494be6c53ff059a0618a815ec7128e6b5244c 100644
--- a/components/update_client/update_checker.cc
+++ b/components/update_client/update_checker.cc
@@ -109,7 +109,7 @@ std::string BuildUpdateCheckRequest(const Configurator& config,
     }
     base::StringAppendF(&app, "/>");
 
-    base::StringAppendF(&app, "<ping rd=\"%d\" ping_freshness=\"%s\" />",
+    base::StringAppendF(&app, "<ping rd=\"%d\" ping_freshness=\"%s\"/>",
                         metadata->GetDateLastRollCall(item->id),
                         metadata->GetPingFreshness(item->id).c_str());
     if (!item->component.fingerprint.empty()) {