Delay generation of User-Agent header to URLRequestHttpJob and accept custom User-Agent from XHR/Fe…

third_party/WebKit/LayoutTests/http/tests/fetch/resources/thorough-util.js

Index: third_party/WebKit/LayoutTests/http/tests/fetch/resources/thorough-util.js
diff --git a/third_party/WebKit/LayoutTests/http/tests/fetch/resources/thorough-util.js b/third_party/WebKit/LayoutTests/http/tests/fetch/resources/thorough-util.js
index 8646486fd68403396158e97d3173ec687fadc970..19d0e1591033256fcf9c666eed4fbfab8b3ac64c 100644
--- a/third_party/WebKit/LayoutTests/http/tests/fetch/resources/thorough-util.js
+++ b/third_party/WebKit/LayoutTests/http/tests/fetch/resources/thorough-util.js
@@ -102,7 +102,8 @@ var checkJsonpResult = function(expected, url, data) {
 var checkJsonpHeader = function(name, value, url, data) {
   assert_equals(data.jsonpResult,
                 'success',
-                url + ' jsonpResult must be success');
+                url + ' jsonpResult must be success (header check name:' +
+                    name + ')');
   assert_equals(data.headers[name],
                 value,
                 'Request header check failed url:' + url + ' name:' + name);
@@ -110,7 +111,7 @@ var checkJsonpHeader = function(name, value, url, data) {
 var checkJsonpMethod = function(method, url, data) {
   assert_equals(data.jsonpResult,
                 'success',
-                url + ' jsonpResult must be success');
+                url + ' jsonpResult must be success (method:' + method + ')');
   assert_equals(data.method,
                 method,
                 'Method must match url:' + url);
@@ -118,7 +119,8 @@ var checkJsonpMethod = function(method, url, data) {
 var checkJsonpAuth = function(username, password, cookie, url, data) {
   assert_equals(data.jsonpResult,
                 'success',
-                url + ' jsonpResult must be success');
+                url + ' jsonpResult must be success (username:' + username +
+                    ' password:' + password + ' cookie:' + cookie);
   assert_equals(data.username,
                 username,
                 'Username must match. url: ' + url);