Convert RLZ to a buildflag header

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")
 import("//components/os_crypt/features.gni")
 import("//components/spellcheck/spellcheck_build_features.gni")
 import("//extensions/features/features.gni")
 import("//media/media_options.gni")
 import("//net/features.gni")
 import("//ppapi/features/features.gni")
 import("//printing/features/features.gni")
+import("//rlz/features/features.gni")
 import("//sandbox/features.gni")
 import("//third_party/protobuf/proto_library.gni")
 import("//ui/base/ui_features.gni")
 
 # //build/config/android/rules.gni imports //tools/grit/grit_rule.gni, which
 # produces a conflict for the "grit" template so we have to only include one.
 if (is_android) {
   import("//build/config/android/rules.gni")
 } else {
   import("//tools/grit/grit_rule.gni")
@@ skipping 1475 matching lines @@
     "//media:media_features",
     "//media/midi",
     "//mojo/common",
     "//mojo/edk/system",
     "//mojo/public/cpp/bindings",
     "//mojo/public/js",
     "//net:extras",
     "//net:net_with_v8",
     "//ppapi/features",
     "//printing/features",
+    "//rlz/features",
     "//services/image_decoder/public/cpp",
     "//services/service_manager/public/cpp",
     "//skia",
     "//sql",
     "//storage/browser",
     "//storage/common",
     "//third_party/WebKit/public:features",
     "//third_party/WebKit/public:image_resources",
     "//third_party/WebKit/public:resources",
     "//third_party/cacheinvalidation",
@@ skipping 2917 matching lines @@
   # linking all of the test support.
   static_library("pepper_cdm_test_constants") {
     testonly = true
     visibility = [ "//chrome/*" ]
     sources = [
       "media/pepper_cdm_test_constants.cc",
       "media/pepper_cdm_test_constants.h",
     ]
   }
 }