First try at removing ? from HTML.

tools/dom/templates/html/impl/impl_AudioContext.darttemplate

Index: tools/dom/templates/html/impl/impl_AudioContext.darttemplate
diff --git a/tools/dom/templates/html/impl/impl_AudioContext.darttemplate b/tools/dom/templates/html/impl/impl_AudioContext.darttemplate
index 1ef4069fa5e4d011dc663061865ca1317b1f26fb..8212a1614a877dfdac0f1f61505fac42f3bd9d50 100644
--- a/tools/dom/templates/html/impl/impl_AudioContext.darttemplate
+++ b/tools/dom/templates/html/impl/impl_AudioContext.darttemplate
@@ -22,12 +22,12 @@ $if DART2JS
       [int numberOfInputChannels, int numberOfOutputChannels]) {
     var function = JS('dynamic', '#.createScriptProcessor || '
         '#.createJavaScriptNode', this, this);
-    if (?numberOfOutputChannels) {
-      return JS('ScriptProcessorNode', '#.call(#, #, #, #)', function, this,
-          bufferSize, numberOfInputChannels, numberOfOutputChannels);
-    } else if (?numberOfInputChannels) {
+    if (numberOfInputChannels != null) {

[blois, 2013/04/30 01:12:19]

Ditto- why flip order here?

       return JS('ScriptProcessorNode', '#.call(#, #, #)', function, this,
           bufferSize, numberOfInputChannels);
+    } else if (numberOfOutputChannels != null) {
+      return JS('ScriptProcessorNode', '#.call(#, #, #, #)', function, this,
+          bufferSize, numberOfInputChannels, numberOfOutputChannels);
     } else {
       return JS('ScriptProcessorNode', '#.call(#, #)', function, this,
           bufferSize);