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

net/url_request/url_request_test_util.cc

Index: net/url_request/url_request_test_util.cc
diff --git a/net/url_request/url_request_test_util.cc b/net/url_request/url_request_test_util.cc
index d13ee06142120b8c37ab467c9dac0cec50119998..2667f32c9248b2ffcdfbf17619f01e1f96c56c43 100644
--- a/net/url_request/url_request_test_util.cc
+++ b/net/url_request/url_request_test_util.cc
@@ -301,8 +301,11 @@ bool TestNetworkDelegate::OnBeforeURLRequest(
   return false;
 }
 
-void TestNetworkDelegate::OnSendHttpRequest(
-    net::HttpRequestHeaders* headers) {
+bool TestNetworkDelegate::OnBeforeSendHeaders(
+    uint64 request_id,
+    net::HttpRequestHeaders* headers,
+    net::CompletionCallback* callback) {
+  return false;
 }
 
 void TestNetworkDelegate::OnResponseStarted(net::URLRequest* request) {