Don't check URLs against Safe Browsing if not supported.

build/config/features.gni

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # This file contains Chrome-feature-related build flags (see ui.gni for
 # UI-related ones). These should theoretically be moved to the build files of
 # the features themselves.
 #
 # However, today we have many "bad" dependencies on some of these flags from,
 # e.g. base, so they need to be global to match the GYP configuration. Also,
@@ skipping 89 matching lines @@
   enable_hangout_services_extension = false
 
   # Enables the use of CDMs in pepper plugins. Chromecast requires that this
   # can be explicitly disabled in gn args.
   enable_pepper_cdms = enable_plugins && (is_linux || is_mac || is_win)
 
   # Variable safe_browsing is used to control the build time configuration
   # for safe browsing feature. Safe browsing can be compiled in 4 different
   # levels: 0 disables it, 1 enables it fully, and 2 enables only UI and
   # reporting features for use with Data Saver on Mobile, and 3 enables
-  # extended mobile protection via an external API.  When 3 is fully deployed,
-  # it will replace 2.
+  # extended mobile protection via an external API.
   if (is_android) {
-    safe_browsing_mode = 2
+    safe_browsing_mode = 3
   } else if (is_ios) {
     safe_browsing_mode = 0
   } else {
     safe_browsing_mode = 1
   }
 
   # Set to true make a build that disables activation of field trial tests
   # specified in testing/variations/fieldtrial_testing_config_*.json.
   # Note: this setting is ignored if is_chrome_branded.
   fieldtrial_testing_like_official_build = is_chrome_branded
@@ skipping 82 matching lines @@
 # system).
 # TODO(GYP) also require !embedded to enable.
 use_gconf = is_linux && !is_chromeos
 
 # Whether to back up data before sync.
 enable_pre_sync_backup = is_win || is_mac || (is_linux && !is_chromeos)
 
 # Enable WebVR support by default on Android
 # Still requires command line flag to access API
 enable_webvr = is_android