Lower the timeout duration for real time URL check requests

This would reduce the time a user has to wait for the initial few page
loads to proceed if they can't reach the Safe Browsing backend.

Bug: 963165
Change-Id: Ie90f41b129208b04fd19614192ee79030b9a9f83
Fixed: 1032317
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1961083
Commit-Queue: Varun Khaneja <vakh@chromium.org>
Commit-Queue: Bettina Dea <bdea@chromium.org>
Auto-Submit: Varun Khaneja <vakh@chromium.org>
Reviewed-by: Bettina Dea <bdea@chromium.org>
Cr-Commit-Position: refs/heads/master@{#723637}

components/safe_browsing/realtime/url_lookup_service.cc

@@ -31,7 +31,7 @@ const size_t kMaxFailuresToEnforceBackoff = 3;
 
 const size_t kBackOffResetDurationInSeconds = 5 * 60;  // 5 minutes.
 
-const size_t kURLLookupTimeoutDurationInSeconds = 1 * 60;  // 1 minute.
+const size_t kURLLookupTimeoutDurationInSeconds = 10;  // 10 seconds.
 
 // Fragements, usernames and passwords are removed, becuase fragments are only
 // used for local navigations and usernames/passwords are too privacy sensitive.