Add support for scout to 'ext' param when creating SafeBrowsing ping URLs.

components/safe_browsing_db/BUILD.gn

 # 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.
 
 import("//third_party/protobuf/proto_library.gni")
 
 proto_library("safebrowsing_proto") {
   sources = [
     "safebrowsing.proto",
   ]
@@ skipping 61 matching lines @@
     "//url",
   ]
 }
 
 static_library("hit_report") {
   sources = [
     "hit_report.cc",
     "hit_report.h",
   ]
   deps = [
+    ":safe_browsing_prefs",
     ":util",
     "//components/metrics",
     "//url",
   ]
 }
 
 static_library("prefix_set") {
   sources = [
     "prefix_set.cc",
     "prefix_set.h",
@@ skipping 358 matching lines @@
     "//base",
     "//components/variations",
     "//testing/gtest",
     "//url",
   ]
   if (is_win) {
     # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
     cflags = [ "/wd4267" ]  # Conversion from size_t to 'type'.
   }
 }