Recognize const/fixed/growable arrays in simple types inferrer.

sdk/lib/_internal/compiler/implementation/js_backend/backend.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.
 
 part of js_backend;
 
 typedef void Recompile(Element element);
 
 class ReturnInfo {
   HType returnType;
@@ skipping 644 matching lines @@
   Element jsStringSplit;
   Element jsStringConcat;
   Element jsStringToString;
 
   ClassElement typeLiteralClass;
   ClassElement mapLiteralClass;
   ClassElement constMapLiteralClass;
 
   Element getInterceptorMethod;
   Element interceptedNames;
-  Element fixedLengthListConstructor;
 
   bool seenAnyClass = false;
 
   final Namer namer;
 
   /**
    * Interface used to determine if an object has the JavaScript
    * indexing behavior. The interface is only visible to specific
    * libraries.
    */
@@ skipping 890 matching lines @@
 
   bool isNullImplementation(ClassElement cls) {
     return cls == jsNullClass;
   }
 
   ClassElement get intImplementation => jsIntClass;
   ClassElement get doubleImplementation => jsDoubleClass;
   ClassElement get numImplementation => jsNumberClass;
   ClassElement get stringImplementation => jsStringClass;
   ClassElement get listImplementation => jsArrayClass;
+  ClassElement get constListImplementation => jsArrayClass;
+  ClassElement get fixedListImplementation => jsFixedArrayClass;
+  ClassElement get growableListImplementation => jsExtendableArrayClass;
   ClassElement get mapImplementation => mapLiteralClass;
   ClassElement get constMapImplementation => constMapLiteralClass;
   ClassElement get functionImplementation => jsFunctionClass;
   ClassElement get typeImplementation => typeLiteralClass;
   ClassElement get boolImplementation => jsBoolClass;
   ClassElement get nullImplementation => jsNullClass;
 }