Use event init dictionaries in core/{css,html}

LayoutTests/fast/events/constructors/media-query-list-event-constructor-expected.txt

Index: LayoutTests/fast/events/constructors/media-query-list-event-constructor-expected.txt
diff --git a/LayoutTests/fast/events/constructors/media-query-list-event-constructor-expected.txt b/LayoutTests/fast/events/constructors/media-query-list-event-constructor-expected.txt
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index 0000000000000000000000000000000000000000..a38912f70f4ea321fac3cbc3121594c0504aa8db
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+++ b/LayoutTests/fast/events/constructors/media-query-list-event-constructor-expected.txt
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+This tests the constructor for the MediaQueryListEvent DOM class.
+
+On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
+
+
+PASS new MediaQueryListEvent('eventType').bubbles is false
+PASS new MediaQueryListEvent('eventType').cancelable is false
+PASS new MediaQueryListEvent('eventType').media is ""
+PASS new MediaQueryListEvent('eventType').matches is false
+PASS new MediaQueryListEvent('eventType', { bubbles: true, cancelable: true }).bubbles is true
+PASS new MediaQueryListEvent('eventType', { bubbles: true, cancelable: true }).cancelable is true
+PASS new MediaQueryListEvent('eventType').media is ""
+PASS new MediaQueryListEvent('eventType').matches is false
+PASS new MediaQueryListEvent('eventType', { media: 'string' }).media is "string"
+PASS new MediaQueryListEvent('eventType', { matches: true }).matches is true
+PASS successfullyParsed is true
+
+TEST COMPLETE
+