Add request_id to HttpRequestInfo and pass it to the NetworkDelegate for events.

net/base/network_delegate.cc

Index: net/base/network_delegate.cc
diff --git a/net/base/network_delegate.cc b/net/base/network_delegate.cc
index 17da7a8ea04b23eab8126609e905e6b4648c5f68..63d69e4bd10866d2bdd1e968070caf25bbce226e 100644
--- a/net/base/network_delegate.cc
+++ b/net/base/network_delegate.cc
@@ -16,10 +16,13 @@ bool NetworkDelegate::NotifyBeforeURLRequest(URLRequest* request,
   return OnBeforeURLRequest(request, callback);
 }
 
-void NetworkDelegate::NotifySendHttpRequest(HttpRequestHeaders* headers) {
+bool NetworkDelegate::NotifyBeforeSendHeaders(uint64 request_id,
+                                              HttpRequestHeaders* headers,
+                                              CompletionCallback* callback) {
   DCHECK(CalledOnValidThread());
   DCHECK(headers);
-  OnSendHttpRequest(headers);
+  DCHECK(callback);
+  return OnBeforeSendHeaders(request_id, headers, callback);
 }
 
 void NetworkDelegate::NotifyResponseStarted(URLRequest* request) {