Add upload identifier to URLRequest::Start net log event.

net/url_request/url_request_netlog_params.cc

Index: net/url_request/url_request_netlog_params.cc
diff --git a/net/url_request/url_request_netlog_params.cc b/net/url_request/url_request_netlog_params.cc
index 67d44c34a400396f43081366a3959578fe4ea6ce..dbc535704962c037c80b86eeea6f0532978a6b84 100644
--- a/net/url_request/url_request_netlog_params.cc
+++ b/net/url_request/url_request_netlog_params.cc
@@ -4,6 +4,7 @@
 
 #include "net/url_request/url_request_netlog_params.h"
 
+#include "base/string_number_conversions.h"
 #include "base/values.h"
 #include "googleurl/src/gurl.h"
 
@@ -13,12 +14,15 @@ Value* NetLogURLRequestStartCallback(const GURL* url,
                                      const std::string* method,
                                      int load_flags,
                                      RequestPriority priority,
+                                     int64 upload_id,
                                      NetLog::LogLevel /* log_level */) {
   DictionaryValue* dict = new DictionaryValue();
   dict->SetString("url", url->possibly_invalid_spec());
   dict->SetString("method", *method);
   dict->SetInteger("load_flags", load_flags);
   dict->SetInteger("priority", static_cast<int>(priority));
+  if (upload_id > -1)
+    dict->SetString("upload_id", base::Int64ToString(upload_id));
   return dict;
 }