Framework to ascribe all network data use to a source.

chrome/browser/io_thread.cc

Index: chrome/browser/io_thread.cc
diff --git a/chrome/browser/io_thread.cc b/chrome/browser/io_thread.cc
index e290a446d4789bb99b6d2f1678f6c35a960c22d3..f7cf37e78d4bb088eaee3eba1c4df6860c8170cc 100644
--- a/chrome/browser/io_thread.cc
+++ b/chrome/browser/io_thread.cc
@@ -34,6 +34,7 @@
 #include "build/build_config.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/data_usage/tab_id_annotator.h"
+#include "chrome/browser/data_use_measurement/chrome_data_use_ascriber.h"
 #include "chrome/browser/net/async_dns_field_trial.h"
 #include "chrome/browser/net/chrome_network_delegate.h"
 #include "chrome/browser/net/dns_probe_service.h"
@@ -502,6 +503,9 @@ void IOThread::Init() {
   data_use_amortizer.reset(new data_usage::android::TrafficStatsAmortizer());
 #endif
 
+  globals_->data_use_ascriber =
+      base::MakeUnique<data_use_measurement::ChromeDataUseAscriber>();
+
   globals_->data_use_aggregator.reset(new data_usage::DataUseAggregator(
       std::unique_ptr<data_usage::DataUseAnnotator>(
           new chrome_browser_data_usage::TabIdAnnotator()),