Add an Error class for ServiceWorkers

LayoutTests/virtual/serviceworker/http/tests/serviceworker/registration-expected.txt

Index: LayoutTests/virtual/serviceworker/http/tests/serviceworker/registration-expected.txt
diff --git a/LayoutTests/ietestcenter/Javascript/15.4.4.15-1-10-expected.txt b/LayoutTests/virtual/serviceworker/http/tests/serviceworker/registration-expected.txt
similarity index 52%
copy from LayoutTests/ietestcenter/Javascript/15.4.4.15-1-10-expected.txt
copy to LayoutTests/virtual/serviceworker/http/tests/serviceworker/registration-expected.txt
index bee5505508b507ece11df60407e3c7df90ae7d47..caab516475c7b1fb4041b5c4e7282b466f830f6e 100644
--- a/LayoutTests/ietestcenter/Javascript/15.4.4.15-1-10-expected.txt
+++ b/LayoutTests/virtual/serviceworker/http/tests/serviceworker/registration-expected.txt
@@ -1,10 +1,14 @@
-15.4.4.15-1-10 (TestCases/chapter15/15.4/15.4.4/15.4.4.15/15.4.4.15-1-10.js) Array.prototype.lastIndexOf applied to the Math object
+Tests if ServiceWorker registration is working
 
 On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
 
 
-PASS ES5Harness.preconditionPassed is true
-PASS ES5Harness.testPassed is true
+Registering normal pattern
+Successfully registered
+Registering pattern outside domain
+PASS 'SecurityError' is regError.name
+Registering pattern outside domain
+PASS 'SecurityError' is regError.name
 PASS successfullyParsed is true
 
 TEST COMPLETE