Moved most of html lib generating scripts into tools.

sdk/lib/html/templates/html/impl/impl_ShadowRoot.darttemplate

Index: sdk/lib/html/templates/html/impl/impl_ShadowRoot.darttemplate
diff --git a/sdk/lib/html/templates/html/impl/impl_ShadowRoot.darttemplate b/sdk/lib/html/templates/html/impl/impl_ShadowRoot.darttemplate
deleted file mode 100644
index f6283de1c63b605dee3ae9d05c3786f5fac63784..0000000000000000000000000000000000000000
--- a/sdk/lib/html/templates/html/impl/impl_ShadowRoot.darttemplate
+++ /dev/null
@@ -1,18 +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.
-
-// WARNING: Do not edit - generated code.
-
-part of html;
-
-/// @domName $DOMNAME
-class $CLASSNAME$EXTENDS$IMPLEMENTS$NATIVESPEC {
-$!MEMBERS
-$if DART2JS
-  static bool get supported =>
-      JS('bool', '!!(window.ShadowRoot || window.WebKitShadowRoot || Element.prototype.webkitCreateShadowRoot)');
-$else
-  static bool get supported => _Utils.shadowRootSupported(window.document);
-$endif
-}