Re-apply issue 11308169: GVN getInterceptor and use the interceptor constant when the type is known.

sdk/lib/_internal/compiler/implementation/elements/elements.dart

 // 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.
 
 library elements;
 
 import 'dart:uri';
 
 // TODO(ahe): Rename prefix to 'api' when VM bug is fixed.
 import '../../compiler.dart' as api_e;
@@ skipping 1834 matching lines @@
     String value = name.stringValue;
     if (value == null) {
       return name;
     } else if (identical(value, '==')) {
       return const SourceString(r'operator$eq');
     } else if (identical(value, '~')) {
       return const SourceString(r'operator$not');
     } else if (identical(value, '[]')) {
       return const SourceString(r'operator$index');
     } else if (identical(value, '[]=')) {
-      return const SourceString(r'oprator$indexSet');
+      return const SourceString(r'operator$indexSet');
     } else if (identical(value, '*')) {
       return const SourceString(r'operator$mul');
     } else if (identical(value, '/')) {
       return const SourceString(r'operator$div');
     } else if (identical(value, '%')) {
       return const SourceString(r'operator$mod');
     } else if (identical(value, '~/')) {
       return const SourceString(r'operator$tdiv');
     } else if (identical(value, '+')) {
       return const SourceString(r'operator$add');
@@ skipping 209 matching lines @@
 
   MetadataAnnotation ensureResolved(Compiler compiler) {
     if (resolutionState == STATE_NOT_STARTED) {
       compiler.resolver.resolveMetadataAnnotation(this);
     }
     return this;
   }
 
   String toString() => 'MetadataAnnotation($value, $resolutionState)';
 }