Move data use measurement to DataUseNetworkDelegate

components/data_use_measurement/core/BUILD.gn

Index: components/data_use_measurement/core/BUILD.gn
diff --git a/components/data_use_measurement/core/BUILD.gn b/components/data_use_measurement/core/BUILD.gn
index 77e9950a3c4c3874c3876bfb7db1b7fcb9a641a1..ee65ff339af7a730d5430d6626da4835234ca735 100644
--- a/components/data_use_measurement/core/BUILD.gn
+++ b/components/data_use_measurement/core/BUILD.gn
@@ -4,19 +4,47 @@
 
 static_library("core") {
   sources = [
+    "data_use_user_data.cc",
+    "data_use_user_data.h",
+  ]
+  deps = [
+    "//base",
+    "//net",
+  ]
+}
+
+static_library("ascriber") {

[RyanSturm, 2016/11/10 22:50:30]

Why the seperate lib? 

[Raj, 2016/11/10 23:20:26]

Library with core files data_use_user_data.* is enough where AttachToFetcher()
is used to label other components/libs (search for
//components/data_use_measurement/core). Otherwise the ascriber files are added.

+  sources = [
     "data_use.cc",
     "data_use.h",
     "data_use_ascriber.cc",
     "data_use_ascriber.h",
+    "data_use_measurement.cc",
+    "data_use_measurement.h",
     "data_use_network_delegate.cc",
     "data_use_network_delegate.h",
     "data_use_recorder.cc",
     "data_use_recorder.h",
-    "data_use_user_data.cc",
-    "data_use_user_data.h",
   ]
   deps = [
+    ":core",
     "//base",
+    "//components/metrics:metrics",
     "//net",
   ]
 }
+
+source_set("unit_tests") {
+  sources = [
+    "data_use_measurement_unittest.cc",
+    "data_use_network_delegate_unittest.cc",
+  ]
+  testonly = true
+  deps = [
+    ":ascriber",
+    ":core",
+    "//base/test:test_support",
+    "//net:test_support",
+    "//testing/gtest",
+  ]
+}