Use GN buildflags and features to configure account consistency

chrome/common/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/buildflag_header.gni")
 import("//build/util/process_version.gni")
 import("//chrome/common/features.gni")
 import("//chrome/process_version_rc_template.gni")  # For branding_file_path.
 import("//extensions/features/features.gni")
 import("//mojo/public/tools/bindings/mojom.gni")
@@ skipping 227 matching lines @@
     "//components/ntp_tiles",
     "//components/offline_pages/core:switches",
     "//components/omnibox/common",
     "//components/password_manager/content/common:mojo_interfaces",
     "//components/password_manager/core/common",
     "//components/policy:generated",
     "//components/policy/core/common",
     "//components/prefs",
     "//components/safe_browsing:csd_proto",
     "//components/signin/core/common",
+    "//components/signin/core/common:signin_features",
     "//components/strings",
     "//components/translate/content/common",
     "//components/translate/core/common",
     "//components/url_formatter",
     "//components/variations",
     "//components/visitedlink/common",
     "//content/public/common",
     "//crypto",
     "//extensions/common:common_constants",
     "//extensions/features",
@@ skipping 484 matching lines @@
 
 mojom("page_load_metrics_mojom") {
   sources = [
     "page_load_metrics/page_load_metrics.mojom",
   ]
 
   public_deps = [
     "//mojo/common:common_custom_types",
   ]
 }