Better handle safe_browsing logic in build dependencies.

chrome/common/features.gni

 # Copyright 2015 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 is the GN version of //chrome/chrome_features.gypi.
 # Please keep in sync!
 
 import("//build/config/chrome_build.gni")
 import("//build/config/chromecast_build.gni")
 import("//build/config/compiler/compiler.gni")
+import("//build/config/features.gni")
 
 # Please keep features in alphabetical order.
 declare_args() {
   # Whether the Java UI is being used (Java infobars and popups, Java native
   # settings and first run experience, sign-in etc.).
   # Default to true if compiling for android, but allow this being overriden
   # through the environment.
   android_java_ui = is_android
 
   # Enables support for background apps.
@@ skipping 30 matching lines @@
 
   # Indicates if the build is using PGO.
   pgo_build = chrome_pgo_phase > 0
 }
 
 chrome_grit_defines = [
   "enable_background=$enable_background",
   "enable_google_now=$enable_google_now",
   "enable_hotwording=$enable_hotwording",
   "enable_vr_shell=$enable_vr_shell",
+  "safe_browsing_mode=$safe_browsing_mode",
   "use_vulcanize=$use_vulcanize",
 ]