Introduce (Chrome)VariationsServiceClient

components/variations/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.
 
 if (is_android) {
   import("//build/config/android/rules.gni")
 }
 
 source_set("variations") {
   sources = [
@@ skipping 22 matching lines @@
     "study_filtering.cc",
     "study_filtering.h",
     "variations_associated_data.cc",
     "variations_associated_data.h",
     "variations_experiment_util.cc",
     "variations_experiment_util.h",
     "variations_seed_processor.cc",
     "variations_seed_processor.h",
     "variations_seed_simulator.cc",
     "variations_seed_simulator.h",
+    "variations_service_client.h",
     "variations_url_constants.cc",
     "variations_url_constants.h",
   ]
 
   deps = [
     "proto",
     "//base",
     "//base:prefs",
     "//third_party/mt19937ar",
   ]
@@ skipping 30 matching lines @@
 
   deps = [
     ":variations",
     "net",
     "proto",
     "//base:prefs_test_support",
     "//base/test:test_support",
     "//testing/gtest",
   ]
 }