Drop [IsIndex] IDL extended attribute from Speech types

LayoutTests/fast/speech/input-onspeechchange-event.html

Index: LayoutTests/fast/speech/input-onspeechchange-event.html
diff --git a/LayoutTests/fast/speech/input-onspeechchange-event.html b/LayoutTests/fast/speech/input-onspeechchange-event.html
index 8dfb178eb8a352dd62b7590b62c72b78ea222aa7..dd89ed71d379c3a9250cf1caec7782f8b9874ea6 100644
--- a/LayoutTests/fast/speech/input-onspeechchange-event.html
+++ b/LayoutTests/fast/speech/input-onspeechchange-event.html
@@ -7,15 +7,18 @@
 <script type="text/javascript">
 description('Tests for the onspeechchange event with &lt;input type="text" speech>.');
 
-function onSpeechChange() {
+var results;
+function onSpeechChange(event) {
+    results = event.results;
     shouldBeEqualToString('document.getElementById("speechInput").value', 'Green eggs and ham');
-    shouldEvaluateTo('window.event.results.length', 3);
-    shouldBeEqualToString('window.event.results[0].utterance', 'Green eggs and ham');
-    shouldEvaluateTo('window.event.results[0].confidence', 0.8);
-    shouldBeEqualToString('window.event.results[1].utterance', 'Green x and ham');
-    shouldEvaluateTo('window.event.results[1].confidence', 0.5);
-    shouldBeEqualToString('window.event.results[2].utterance', '3 x and am');
-    shouldEvaluateTo('window.event.results[2].confidence', 0.2);
+    shouldEvaluateTo('results.length', 3);
+    shouldBeEqualToString('results[0].utterance', 'Green eggs and ham');
+    shouldEvaluateTo('results[0].confidence', 0.8);
+    shouldBeEqualToString('results[1].utterance', 'Green x and ham');
+    shouldEvaluateTo('results[1].confidence', 0.5);
+    shouldBeEqualToString('results[2].utterance', '3 x and am');
+    shouldEvaluateTo('results[2].confidence', 0.2);
+    shouldBeNull("results.item(-1)");
     finishJSTest();
 }
 
@@ -39,6 +42,6 @@ window.onload = run;
 window.jsTestIsAsync = true;
 </script>
 <script src="../js/resources/js-test-post.js"></script>
-<input id='speechInput' x-webkit-speech onwebkitspeechchange="onSpeechChange()">
+<input id='speechInput' x-webkit-speech onwebkitspeechchange="onSpeechChange(event)">
 </body>
 </html>