New tests for initializing formal access.

pkg/compiler/lib/src/cps_ir/cps_ir_builder_task.dart

 // Copyright (c) 2013, 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 dart2js.ir_builder_task;
 
 import 'package:js_runtime/shared/embedded_names.dart'
     show JsBuiltin, JsGetName;
 
 import '../closure.dart' as closure;
@@ skipping 3841 matching lines @@
     handleSend(node);
     node.visitChildren(this);
   }
 
   visitSendSet(ast.SendSet node) {
     handleSend(node);
     Element element = elements[node];
     if (Elements.isLocal(element)) {
       LocalElement local = element;
       if (insideInitializer &&
-          local.isParameter &&
+          (local.isParameter || local.isInitializingFormal) &&
           local.enclosingElement == currentFunction) {
         assert(local.enclosingElement.isConstructor);
         // Initializers in an initializer-list can communicate via parameters.
         // If a parameter is stored in an initializer list we box it.
         // TODO(sigurdm): Fix this.
         // Though these variables do not outlive the activation of the
         // function, they still need to be boxed.  As a simplification, we
         // treat them as if they are captured by a closure (i.e., they do
         // outlive the activation of the function).
         markAsCaptured(local);
       } else if (inTryStatement) {
-        assert(local.isParameter || local.isVariable);
+        assert(local.isParameter ||
+            local.isVariable ||
+            local.isInitializingFormal);
         // Search for the position of the try block containing the variable
         // declaration, or -1 if it is declared outside the outermost try.
         int i = tryNestingStack.length - 1;
         while (i >= 0 && !tryNestingStack[i].declared.contains(local)) {
           --i;
         }
         // If there is a next inner try, then the variable should be boxed on
         // entry to it.
         if (i + 1 < tryNestingStack.length) {
           tryNestingStack[i + 1].boxedOnEntry.add(local);
@@ skipping 137 matching lines @@
       _backend.jsInteropAnalysis.hasAnonymousAnnotation(element.contextClass);
 
   String getJsInteropTargetPath(FunctionElement element) {
     return '${_backend.namer.fixedBackendPath(element)}.'
         '${_backend.nativeData.getFixedBackendName(element)}';
   }
 
   DartType get jsJavascriptObjectType =>
       _backend.helpers.jsJavaScriptObjectClass.thisType;
 }