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..2b06d8c4f24f0d08396f44ec1efeba650c7a6ad4 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) {
@@ -324,3 +327,6 @@ net::URLRequestJob* TestNetworkDelegate::OnMaybeCreateURLRequestJob(
     net::URLRequest* request) {
   return NULL;
 }
+
+void TestNetworkDelegate::OnURLRequestDestroyed(net::URLRequest* request) {
+}