Move the tts and ttsEngine APIs out of experimental, and give

chrome/test/data/extensions/api_test/tts/optional_args/test.js

Index: chrome/test/data/extensions/api_test/tts/optional_args/test.js
===================================================================
--- chrome/test/data/extensions/api_test/tts/optional_args/test.js	(revision 93167)
+++ chrome/test/data/extensions/api_test/tts/optional_args/test.js	(working copy)
@@ -8,43 +8,43 @@
   function testSpeakWithOptionalArgs() {
     // This will fail.
     try {
-      chrome.experimental.tts.speak();
+      chrome.tts.speak();
       chrome.test.fail();
     } catch (e) {
     }
 
     // This will succeed but nothing will be spoken.
-    chrome.experimental.tts.speak('');
+    chrome.tts.speak('');
 
     // This will succeed.
-    chrome.experimental.tts.speak('Alpha');
+    chrome.tts.speak('Alpha');
 
     // This will fail.
     try {
-      chrome.experimental.tts.speak(null);
+      chrome.tts.speak(null);
       chrome.test.fail();
     } catch (e) {
     }
 
     // This will succeed.
-    chrome.experimental.tts.speak('Bravo', {});
+    chrome.tts.speak('Bravo', {});
 
     // This will succeed.
-    chrome.experimental.tts.speak('Charlie', null);
+    chrome.tts.speak('Charlie', null);
 
     // This will fail.
     try {
-      chrome.experimental.tts.speak('Delta', 'foo');
+      chrome.tts.speak('Delta', 'foo');
       chrome.test.fail();
     } catch (e) {
     }
 
     // This will succeed.
-    chrome.experimental.tts.speak('Echo', {}, function() {});
+    chrome.tts.speak('Echo', {}, function() {});
 
     // This will fail.
     try {
-      chrome.experimental.tts.speak('Foxtrot', {}, 'foo');
+      chrome.tts.speak('Foxtrot', {}, 'foo');
       chrome.test.fail();
     } catch (e) {
     }