Make the launch params the default client behavior for UMA 3g

components/metrics/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.
 
 declare_args() {
   # Overrides os name in uma metrics log to "Blimp".
   metrics_use_blimp = false
 }
 
 # GYP version: components/metrics.gypi:metrics
@@ skipping 133 matching lines @@
       "//base",
       "//components/metrics/proto:proto",
       "//content/public/browser",
     ]
   }
 }
 
 # GYP version: components/metrics.gypi:metrics_net
 static_library("net") {
   sources = [
+    "net/cellular_logic_helper.cc",
+    "net/cellular_logic_helper.h",
     "net/net_metrics_log_uploader.cc",
     "net/net_metrics_log_uploader.h",
     "net/network_metrics_provider.cc",
     "net/network_metrics_provider.h",
     "net/version_utils.cc",
     "net/version_utils.h",
     "net/wifi_access_point_info_provider.cc",
     "net/wifi_access_point_info_provider.h",
   ]
 
   public_deps = [
     ":metrics",
   ]
   allow_circular_includes_from = [ ":metrics" ]
 
   deps = [
     "//base",
     "//components/data_use_measurement/core",
+    "//components/variations",
     "//components/version_info",
     "//net",
     "//url",
   ]
 
   if (is_chromeos) {
     sources += [
       "net/wifi_access_point_info_provider_chromeos.cc",
       "net/wifi_access_point_info_provider_chromeos.h",
     ]
@@ skipping 180 matching lines @@
 
   # These are only used by the blimp team, which has entirely migrated to gn,
   # so this logic is not replicated in the gyp file.
   if (metrics_use_blimp) {
     defines = [
       "OVERRIDE_OS_NAME_TO_BLIMP",
       "ENABLE_REPORTING_BLIMP",
     ]
   }
 }