Create component to expose network usage stats to consumers.

chrome/browser/net/chrome_network_delegate.h

Index: chrome/browser/net/chrome_network_delegate.h
diff --git a/chrome/browser/net/chrome_network_delegate.h b/chrome/browser/net/chrome_network_delegate.h
index 3717a33737ec86115b73275e4a02f14835812db7..43dbc57e871498ee91649ca92ec88fa3a94dcf1f 100644
--- a/chrome/browser/net/chrome_network_delegate.h
+++ b/chrome/browser/net/chrome_network_delegate.h
@@ -15,7 +15,6 @@
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/values.h"
-#include "components/data_reduction_proxy/core/browser/data_reduction_proxy_metrics.h"
 #include "net/base/network_delegate_impl.h"
 
 #if !defined(OS_IOS)
@@ -42,6 +41,10 @@ namespace content_settings {
 class CookieSettings;
 }
 
+namespace data_usage {
+class DataUseAggregator;
+}
+
 namespace domain_reliability {
 class DomainReliabilityMonitor;
 }
@@ -120,6 +123,10 @@ class ChromeNetworkDelegate : public net::NetworkDelegateImpl {
     domain_reliability_monitor_ = monitor;
   }
 
+  void set_data_use_aggregator(
+      data_usage::DataUseAggregator* data_use_aggregator,
+      bool is_data_usage_off_the_record);
+
   // Binds the pref members to |pref_service| and moves them to the IO thread.
   // |enable_referrers| cannot be NULL, the others can.
   // This method should be called on the UI thread.
@@ -155,6 +162,8 @@ class ChromeNetworkDelegate : public net::NetworkDelegateImpl {
   void OnResponseStarted(net::URLRequest* request) override;
   void OnNetworkBytesReceived(const net::URLRequest& request,
                               int64_t bytes_received) override;
+  void OnNetworkBytesSent(const net::URLRequest& request,
+                          int64_t bytes_sent) override;
   void OnCompleted(net::URLRequest* request, bool started) override;
   void OnURLRequestDestroyed(net::URLRequest* request) override;
   void OnURLRequestJobOrphaned(net::URLRequest* request) override;
@@ -180,10 +189,6 @@ class ChromeNetworkDelegate : public net::NetworkDelegateImpl {
       const GURL& target_url,
       const GURL& referrer_url) const override;
 
-  void AccumulateContentLength(
-      int64 received_payload_byte_count,
-      int64 original_payload_byte_count);
-
   scoped_ptr<ChromeExtensionsNetworkDelegate> extensions_delegate_;
 
   void* profile_;
@@ -214,6 +219,11 @@ class ChromeNetworkDelegate : public net::NetworkDelegateImpl {
 
   bool experimental_web_platform_features_enabled_;
 
+  // Aggregates and reports network usage.
+  data_usage::DataUseAggregator* data_use_aggregator_;
+  // Controls whether network usage is reported as being off the record.
+  bool is_data_usage_off_the_record_;
+
   DISALLOW_COPY_AND_ASSIGN(ChromeNetworkDelegate);
 };