dart2js: Use correct call structures throughout the backend.

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

 // Copyright (c) 2014, 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_nodes_sexpr;
 
 import '../constants/values.dart';
 import '../util/util.dart';
 import 'cps_ir_nodes.dart';
 import '../universe/call_structure.dart' show
@@ skipping 130 matching lines @@
 
   String visitInvokeMethodDirectly(InvokeMethodDirectly node) {
     String receiver = access(node.receiver);
     String name = node.selector.name;
     String args = formatArguments(node.selector.callStructure, node.arguments,
         node.callingConvention);
     return '(InvokeMethodDirectly $receiver $name $args)';
   }
 
   String visitInvokeConstructor(InvokeConstructor node) {
-    String className;
     // TODO(karlklose): for illegal nodes constructed for tests or unresolved
     // constructor calls in the DartBackend, we get an element with no enclosing
     // class.  Clean this up by introducing a name field to the node and
     // removing [ErroneousElement]s from the IR.
-    if (node.dartType != null) {
-      className = node.dartType.toString();
-    } else {
-      className = node.target.enclosingClass.name;
-    }
-    String callName;
-    if (node.target.name.isEmpty) {
-      callName = '${className}';
-    } else {
-      callName = '${className}.${node.target.name}';
+    String name = node.dartType != null
+        ? node.dartType.toString()
+        : node.target.enclosingClass.name;
+    if (!node.target.name.isEmpty) {
+      name = '${name}.${node.target.name}';
     }
     String args = formatArguments(node.selector.callStructure, node.arguments);
-    return '(InvokeConstructor $callName $args)';
+    return '(InvokeConstructor $name $args)';
   }
 
   String visitInvokeContinuation(InvokeContinuation node) {
     String name = access(node.continuation);
     if (node.isRecursive) name = 'rec $name';
     String args = node.arguments.map(access).join(' ');
     return '$indentation(InvokeContinuation $name ($args))';
   }
 
   String visitThrow(Throw node) {
@@ skipping 294 matching lines @@
   void setReturnContinuation(Continuation node) {
     assert(!_names.containsKey(node) || _names[node] == 'return');
     _names[node] = 'return';
   }
 
   String getName(Node node) {
     if (!_names.containsKey(node)) return 'MISSING_NAME';
     return _names[node];
   }
 }