Amortize data usage using TrafficStats on Android.

components/data_usage/android/BUILD.gn

Index: components/data_usage/android/BUILD.gn
diff --git a/components/data_usage/core/BUILD.gn b/components/data_usage/android/BUILD.gn
similarity index 68%
copy from components/data_usage/core/BUILD.gn
copy to components/data_usage/android/BUILD.gn
index 06e19b97a59beab487700bf1dfe189ad247a9ec3..f3d70da3dc34053b8fec3459276f5aad9d039269 100644
--- a/components/data_usage/core/BUILD.gn
+++ b/components/data_usage/android/BUILD.gn
@@ -2,16 +2,14 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-source_set("core") {
+source_set("android") {
   sources = [
-    "data_use.cc",
-    "data_use.h",
-    "data_use_aggregator.cc",
-    "data_use_aggregator.h",
-    "data_use_annotator.h",
+    "traffic_stats_amortizer.cc",
+    "traffic_stats_amortizer.h",
   ]
   deps = [
     "//base",
+    "//components/data_usage/core",
     "//net",
     "//url",
   ]
@@ -20,15 +18,16 @@ source_set("core") {
 source_set("unit_tests") {
   testonly = true
   sources = [
-    "data_use_aggregator_unittest.cc",
+    "traffic_stats_amortizer_unittest.cc",
   ]
 
   configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
 
   deps = [
-    ":core",
+    ":android",
     "//base",
     "//base/test:test_support",
+    "//components/data_usage/core",
     "//net:test_support",
     "//testing/gtest",
   ]