Very basic change to add a TriggerManager class owned by SafeBrowsingService.

chrome/browser/BUILD.gn

 # 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.
 
 import("//build/config/chrome_build.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//build/split_static_library.gni")
 import("//chrome/common/features.gni")
@@ skipping 2132 matching lines @@
       "safe_browsing/v4_test_utils.h",
     ]
     deps += [
       "//chrome/browser/safe_browsing:chunk_proto",
       "//chrome/common/safe_browsing:proto",
       "//components/safe_browsing:csd_proto",
       "//components/safe_browsing:safe_browsing",
       "//components/safe_browsing/browser:browser",
       "//components/safe_browsing/common:common",
       "//components/safe_browsing/password_protection",
+      "//components/safe_browsing/triggers:triggers",
       "//components/safe_browsing_db:metadata_proto",
     ]
     if (safe_browsing_mode == 1) {
       # "Safe Browsing Full" files in addition to the "basic" ones to use for
       # full safe browsing. This has some in common with "mobile."
       sources += [
         "download/download_completion_blocker.cc",
         "download/download_completion_blocker.h",
         "loader/safe_browsing_resource_throttle.cc",
         "loader/safe_browsing_resource_throttle.h",
@@ skipping 2536 matching lines @@
       "media/pepper_cdm_test_constants.cc",
       "media/pepper_cdm_test_constants.h",
     ]
   }
 }
 
 service_manifest("preferences_forwarder_manifest") {
   name = "preferences_forwarder"
   source = "prefs/forwarder_manifest.json"
 }