Protobuf for Traffic Annotation and first use by a URLFetcher.

net/url_request/url_request_context.h

Index: net/url_request/url_request_context.h
diff --git a/net/url_request/url_request_context.h b/net/url_request/url_request_context.h
index 0158d9aca17282fb5153f318f65d596a3c5fb6ef..a6181606825c87dc8039e626625aac062a7631a4 100644
--- a/net/url_request/url_request_context.h
+++ b/net/url_request/url_request_context.h
@@ -22,6 +22,7 @@
 #include "net/http/http_server_properties.h"
 #include "net/http/transport_security_state.h"
 #include "net/ssl/ssl_config_service.h"
+#include "net/traffic_annotation/network_traffic_annotation.h"
 #include "net/url_request/url_request.h"
 
 namespace net {
@@ -63,14 +64,20 @@ class NET_EXPORT URLRequestContext
   // session.
   const HttpNetworkSession::Params* GetNetworkSessionParams() const;
 
+  // DEPRECATED. Please use the version with NetworkTrafficAnnotationTag in the
+  // future.
   std::unique_ptr<URLRequest> CreateRequest(
       const GURL& url,
       RequestPriority priority,
       URLRequest::Delegate* delegate) const;
 
-  NetLog* net_log() const {
-    return net_log_;
-  }
+  std::unique_ptr<URLRequest> CreateRequest(
+      const GURL& url,
+      RequestPriority priority,
+      URLRequest::Delegate* delegate,
+      NetworkTrafficAnnotationTag traffic_classification) const;
+
+  NetLog* net_log() const { return net_log_; }
 
   void set_net_log(NetLog* net_log) {
     net_log_ = net_log;