Report data usage UMA for Chrome services

sync/internal_api/public/http_bridge.h

Index: sync/internal_api/public/http_bridge.h
diff --git a/sync/internal_api/public/http_bridge.h b/sync/internal_api/public/http_bridge.h
index 36704e2a1bd5040db54b1f3a9f551d717c671758..73e68a520741abcf41e22ce6952924f6abdcbaac 100644
--- a/sync/internal_api/public/http_bridge.h
+++ b/sync/internal_api/public/http_bridge.h
@@ -54,7 +54,8 @@ class SYNC_EXPORT_PRIVATE HttpBridge
  public:
   HttpBridge(const std::string& user_agent,
              const scoped_refptr<net::URLRequestContextGetter>& context,
-             const NetworkTimeUpdateCallback& network_time_update_callback);
+             const NetworkTimeUpdateCallback& network_time_update_callback,
+             const BindToTrackerCallback& bind_to_tracker_callback);
 
   // HttpPostProvider implementation.
   void SetExtraRequestHeaders(const char* headers) override;
@@ -180,6 +181,10 @@ class SYNC_EXPORT_PRIVATE HttpBridge
   // Callback for updating network time.
   NetworkTimeUpdateCallback network_time_update_callback_;
 
+  // A callback to tag Sync request to be able to record data use of this
+  // service by data_use_measurement component.
+  BindToTrackerCallback bind_to_tracker_callback_;
+
   DISALLOW_COPY_AND_ASSIGN(HttpBridge);
 };
 
@@ -194,7 +199,8 @@ class SYNC_EXPORT HttpBridgeFactory : public HttpPostProviderFactory,
   ~HttpBridgeFactory() override;
 
   // HttpPostProviderFactory:
-  void Init(const std::string& user_agent) override;
+  void Init(const std::string& user_agent,
+            const BindToTrackerCallback& bind_to_tracker_callback) override;
   HttpPostProviderInterface* Create() override;
   void Destroy(HttpPostProviderInterface* http) override;
 
@@ -216,6 +222,10 @@ class SYNC_EXPORT HttpBridgeFactory : public HttpPostProviderFactory,
 
   CancelationSignal* const cancelation_signal_;
 
+  // A callback to tag Sync request to be able to record data use of this
+  // service by data_use_measurement component.
+  BindToTrackerCallback bind_to_tracker_callback_;
+
   DISALLOW_COPY_AND_ASSIGN(HttpBridgeFactory);
 };