[DevTools] Log failed XHR requests.

LayoutTests/http/tests/inspector/console-xhr-logging-expected.txt

Index: LayoutTests/http/tests/inspector/console-xhr-logging-expected.txt
diff --git a/LayoutTests/http/tests/inspector/console-xhr-logging-expected.txt b/LayoutTests/http/tests/inspector/console-xhr-logging-expected.txt
index 50acf2067345bbbc224479730830493770c003c4..168625ce7666dd2daa9f029a3dccbb5017e0f626 100644
--- a/LayoutTests/http/tests/inspector/console-xhr-logging-expected.txt
+++ b/LayoutTests/http/tests/inspector/console-xhr-logging-expected.txt
@@ -23,6 +23,7 @@ console-xhr-logging.html:10 sending a POST request to resources/post-target.cgi
 network-test.js:121 XHR finished loading: POST "http://127.0.0.1:8000/inspector/resources/post-target.cgi".makeXHR @ network-test.js:121makeSimpleXHRWithPayload @ network-test.js:100makeSimpleXHR @ network-test.js:95requestHelper @ console-xhr-logging.html:11makeRequests @ console-xhr-logging.html:21(anonymous function) @ VM:1
 console-xhr-logging.html:10 sending a GET request to http://localhost:8000/inspector/resources/xhr-exists.html
 network-test.js:121 XMLHttpRequest cannot load http://localhost:8000/inspector/resources/xhr-exists.html. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://127.0.0.1:8000' is therefore not allowed access.makeXHR @ network-test.js:121makeSimpleXHRWithPayload @ network-test.js:100makeSimpleXHR @ network-test.js:95requestHelper @ console-xhr-logging.html:11makeRequests @ console-xhr-logging.html:23(anonymous function) @ VM:1
+network-test.js:121 XHR failed loading: GET "http://localhost:8000/inspector/resources/xhr-exists.html".makeXHR @ network-test.js:121makeSimpleXHRWithPayload @ network-test.js:100makeSimpleXHR @ network-test.js:95requestHelper @ console-xhr-logging.html:11makeRequests @ console-xhr-logging.html:23(anonymous function) @ VM:1
 console-xhr-logging.html:10 sending a GET request to resources/xhr-exists.html
 console-xhr-logging.html:10 sending a GET request to resources/xhr-does-not-exist.html
 network-test.js:121 GET http://127.0.0.1:8000/inspector/resources/xhr-does-not-exist.html 404 (Not Found)makeXHR @ network-test.js:121makeSimpleXHRWithPayload @ network-test.js:100makeSimpleXHR @ network-test.js:95requestHelper @ console-xhr-logging.html:11makeRequests @ console-xhr-logging.html:19(anonymous function) @ VM:1