Deprecate new internal Dartium/JsInterop APIs that are public

tools/dom/templates/html/dartium/indexed_db_dartium.darttemplate

 // 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.
 
 // DO NOT EDIT
 // Auto-generated dart:indexed_db library.
 
 /**
  * A client-side key-value store with support for indexes.
  *
@@ skipping 89 matching lines @@
   static KeyRange createKeyRange_upperBound(
       /*IDBKey*/ bound, [bool open = false]) =>
       KeyRange.upperBound_(bound, open);
 
   static KeyRange createKeyRange_bound(
       /*IDBKey*/ lower, /*IDBKey*/ upper,
       [bool lowerOpen = false, bool upperOpen = false]) =>
       KeyRange.bound_(lower, upper, lowerOpen, upperOpen);
 }
 // FIXME: Can we make this private?
+@Deprecated("Internal Use Only")
 final indexed_dbBlinkMap = {
 $!TYPE_MAP
 };
 
 $if JSINTEROP
 // FIXME: Can we make this private?
+@Deprecated("Internal Use Only")
 final indexed_dbBlinkFunctionMap = {
 $!TYPE_FUNCTION_MAP
 };
 $endif