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

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

Index: client/dom/generated/src/frog/Entry.dart
diff --git a/client/dom/generated/src/frog/Entry.dart b/client/dom/generated/src/frog/Entry.dart
index 5ad2b0996abd15233e6f4dce156761999a0158ab..bc92c7250a7afd856bcaf2f76c40b6ee2fd7bbd0 100644
--- a/client/dom/generated/src/frog/Entry.dart
+++ b/client/dom/generated/src/frog/Entry.dart
@@ -1,7 +1,7 @@
 
-class EntryJs extends DOMTypeJs implements Entry native "*Entry" {
+class _EntryJs extends _DOMTypeJs implements Entry native "*Entry" {
 
-  DOMFileSystemJs get filesystem() native "return this.filesystem;";
+  _DOMFileSystemJs get filesystem() native "return this.filesystem;";
 
   String get fullPath() native "return this.fullPath;";
 
@@ -11,13 +11,13 @@ class EntryJs extends DOMTypeJs implements Entry native "*Entry" {
 
   String get name() native "return this.name;";
 
-  void copyTo(DirectoryEntryJs parent, [String name = null, EntryCallback successCallback = null, ErrorCallback errorCallback = null]) native;
+  void copyTo(_DirectoryEntryJs parent, [String name = null, EntryCallback successCallback = null, ErrorCallback errorCallback = null]) native;
 
   void getMetadata(MetadataCallback successCallback, [ErrorCallback errorCallback = null]) native;
 
   void getParent([EntryCallback successCallback = null, ErrorCallback errorCallback = null]) native;
 
-  void moveTo(DirectoryEntryJs parent, [String name = null, EntryCallback successCallback = null, ErrorCallback errorCallback = null]) native;
+  void moveTo(_DirectoryEntryJs parent, [String name = null, EntryCallback successCallback = null, ErrorCallback errorCallback = null]) native;
 
   void remove(VoidCallback successCallback, [ErrorCallback errorCallback = null]) native;