Moved most of html lib generating scripts into tools.

sdk/lib/html/src/dart2js_FactoryProviders.dart

Index: sdk/lib/html/src/dart2js_FactoryProviders.dart
diff --git a/sdk/lib/html/src/dart2js_FactoryProviders.dart b/sdk/lib/html/src/dart2js_FactoryProviders.dart
deleted file mode 100644
index 03edac98f5fb5728ccd9559f4a94cda07e1ea5b6..0000000000000000000000000000000000000000
--- a/sdk/lib/html/src/dart2js_FactoryProviders.dart
+++ /dev/null
@@ -1,10 +0,0 @@
-// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-part of html;
-
-class _TextFactoryProvider {
-  static Text createText(String data) =>
-      JS('Text', 'document.createTextNode(#)', data);
-}