Move data use measurement to DataUseNetworkDelegate

Currently data_use_measurement hooks to ChromeNetworkDelegate. It is more
appropriate to hook to DataUseNetworkDelegate, since getting web content
observer events other UI events will be easier (in future CLs) from
DataUseAscriber.

BUG=648808

Review-Url: https://codereview.chromium.org/2462983003
Cr-Commit-Position: refs/heads/master@{#432910}
diff --git a/chrome/browser/BUILD.gn b/chrome/browser/BUILD.gn
index 693b044..1331eb8 100644
--- a/chrome/browser/BUILD.gn
+++ b/chrome/browser/BUILD.gn
@@ -1314,7 +1314,7 @@
     "//components/data_reduction_proxy/core/browser",
     "//components/data_usage/core",
     "//components/data_use_measurement/content",
-    "//components/data_use_measurement/core",
+    "//components/data_use_measurement/core:ascriber",
     "//components/device_event_log",
     "//components/dom_distiller/content/browser",
     "//components/domain_reliability",