Change new List(n) to return fixed length list.

sdk/lib/_internal/compiler/implementation/js_backend/emitter.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;
 
 /**
  * A function element that represents a closure call. The signature is copied
  * from the given element.
  */
@@ skipping 632 matching lines @@
     // If the method is in an interceptor class, we need to also pass
     // the actual receiver.
     int extraArgumentCount = isInterceptorClass ? 1 : 0;
     // Use '$receiver' to avoid clashes with other parameter names. Using
     // '$receiver' works because [:namer.safeName:] used for getting parameter
     // names never returns a name beginning with a single '$'.
     String receiverArgumentName = r'$receiver';
 
     // The parameters that this stub takes.
     List<jsAst.Parameter> parametersBuffer =
-        new List<jsAst.Parameter>.fixedLength(
-            selector.argumentCount + extraArgumentCount);
+        new List<jsAst.Parameter>(selector.argumentCount + extraArgumentCount);
     // The arguments that will be passed to the real method.
     List<jsAst.Expression> argumentsBuffer =
-        new List<jsAst.Expression>.fixedLength(
+        new List<jsAst.Expression>(
             parameters.parameterCount + extraArgumentCount);
 
     int count = 0;
     if (isInterceptorClass) {
       count++;
       parametersBuffer[0] = new jsAst.Parameter(receiverArgumentName);
       argumentsBuffer[0] = js[receiverArgumentName];
     }
 
     int indexOfLastOptionalArgumentInParameters = positionalArgumentCount - 1;
@@ skipping 2040 matching lines @@
 """;
 const String HOOKS_API_USAGE = """
 // The code supports the following hooks:
 // dartPrint(message)   - if this function is defined it is called
 //                        instead of the Dart [print] method.
 // dartMainRunner(main) - if this function is defined, the Dart [main]
 //                        method will not be invoked directly.
 //                        Instead, a closure that will invoke [main] is
 //                        passed to [dartMainRunner].
 """;