client: don't log about getting dbus proxy tries until one fails.

BUG=chromium-os:19105
TEST=tested on device

Change-Id: Ib616a293829f1db7ecb1ab4d882e453ee9ee7f5a
Reviewed-on: http://gerrit.chromium.org/gerrit/5898
Reviewed-by: Darin Petkov <petkov@chromium.org>
Tested-by: Andrew de los Reyes <adlr@chromium.org>
diff --git a/update_engine_client.cc b/update_engine_client.cc
index 1514561..fb2d418 100644
--- a/update_engine_client.cc
+++ b/update_engine_client.cc
@@ -47,7 +47,8 @@
     LOG(FATAL) << "Failed to get bus";
   }
   for (int i = 0; !proxy && i < kTries; ++i) {
-    LOG(INFO) << "Trying to get dbus proxy. Try " << (i + 1) << "/" << kTries;
+    LOG_IF(INFO, i) << "Trying to get dbus proxy. Try "
+                    << (i + 1) << "/" << kTries;
     proxy = dbus_g_proxy_new_for_name_owner(bus,
                                             kUpdateEngineServiceName,
                                             kUpdateEngineServicePath,