Removed DARTIUM codegen for IDLS (sdk/lib/dartium)

tools/dom/templates/html/impl/impl_Crypto.darttemplate

 // Copyright (c) 2015, 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 $LIBRARYNAME;
 
 $(ANNOTATIONS)$(NATIVESPEC)$(CLASS_MODIFIERS)class $CLASSNAME$EXTENDS$IMPLEMENTS {
 
   TypedData getRandomValues(TypedData array) {
-$if DART2JS
     return _getRandomValues(array);
-$else
-    var random = _getRandomValues(array);
-    // The semantics of the operation are that it modifies the argument, but we
-    // have no way of making a Dart typed data created initially in Dart reference
-    // externalized storage. So we copy the values back from the returned copy.
-    // TODO(alanknight): Make this less ridiculously slow.
-    for (var i = 0; i < random.length; i++) {
-      array[i] = random[i];
-    }
-    return array;
-$endif
   }
 
 $!MEMBERS
 }