AppCache error details tests

LayoutTests/http/tests/appcache/modified-manifest-expected.txt

Index: LayoutTests/http/tests/appcache/modified-manifest-expected.txt
diff --git a/LayoutTests/http/tests/appcache/modified-manifest-expected.txt b/LayoutTests/http/tests/appcache/modified-manifest-expected.txt
new file mode 100644
index 0000000000000000000000000000000000000000..3f4aa841bc72b103c4495d4e1d511abffc964fa5
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+++ b/LayoutTests/http/tests/appcache/modified-manifest-expected.txt
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+Test that a manifest that changes during an update fails.
+
+On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
+
+
+PASS gotCheckingEvent is true
+PASS gotDownloadingEvent is true
+PASS window.applicationCache.status is applicationCache.UNCACHED
+PASS 'reason' in event is true
+PASS 'url' in event is true
+PASS 'status' in event is true
+PASS 'message' in event is true
+PASS event.reason is "changed"
+PASS event.url is ""
+PASS event.status is 0
+PASS successfullyParsed is true
+
+TEST COMPLETE
+