Make dart:dom implementation types private so they don't muddle the docs.

client/dom/generated/src/frog/AudioParam.dart

Index: client/dom/generated/src/frog/AudioParam.dart
diff --git a/client/dom/generated/src/frog/AudioParam.dart b/client/dom/generated/src/frog/AudioParam.dart
index 295fe2a85cbca99cdad1f8b6ee8fd3ad1e9446b2..87afdec9adf25a2e1959eb9bd1cae7ea2ba663f3 100644
--- a/client/dom/generated/src/frog/AudioParam.dart
+++ b/client/dom/generated/src/frog/AudioParam.dart
@@ -1,5 +1,5 @@
 
-class AudioParamJs extends DOMTypeJs implements AudioParam native "*AudioParam" {
+class _AudioParamJs extends _DOMTypeJs implements AudioParam native "*AudioParam" {
 
   num get defaultValue() native "return this.defaultValue;";
 
@@ -25,5 +25,5 @@ class AudioParamJs extends DOMTypeJs implements AudioParam native "*AudioParam"
 
   void setValueAtTime(num value, num time) native;
 
-  void setValueCurveAtTime(Float32ArrayJs values, num time, num duration) native;
+  void setValueCurveAtTime(_Float32ArrayJs values, num time, num duration) native;
 }