Check GetTimeZoneInformation(...) returned value

Based on the doc of the GetTimeZoneInformation(...) API
  https://docs.microsoft.com/en-us/windows/win32/api/timezoneapi/nf-timezoneapi-gettimezoneinformation

Returned value needs to be compare to the value TIME_ZONE_ID_INVALID (-1).

Follow up on a bug introduced here:
  https://chromium-review.googlesource.com/c/chromium/src/+/2583012

R=gab@chromium.org

Bug: 1074036
Change-Id: I7d227cd7a85b0b50eaea6be364012dee3d9357b5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2631925Reviewed-by: Gabriel Charette <gab@chromium.org>
Reviewed-by: Mark Mentovai <mark@chromium.org>
Commit-Queue: Etienne Bergeron <etienneb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#843963}

services/device/time_zone_monitor/time_zone_monitor_win.cc

@@ -60,7 +60,8 @@ class TimeZoneMonitorWin : public TimeZoneMonitor {
   std::string GetPlatformTimeZone() {
     std::string timezone;
     TIME_ZONE_INFORMATION time_zone_information;
-    if (::GetTimeZoneInformation(&time_zone_information)) {
+    if (::GetTimeZoneInformation(&time_zone_information) !=
+        TIME_ZONE_ID_INVALID) {
       // StandardName field may be empty.
       timezone = base::WideToUTF8(time_zone_information.StandardName);
     }