Implement constructor bodies and initializers in CPS->JS backend.

tests/compiler/dart2js/js_backend_cps_ir_constructor_test.dart

+// Copyright (c) 2015, 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.
+// VMOptions=-DUSE_CPS_IR=true
+
+// Tests of interceptors.
+
+library constructor_test;
+
+import 'js_backend_cps_ir.dart';
+
+const List<TestEntry> tests = const [
+  const TestEntry.forMethod('generative_constructor(Sub#)', """
+class Base {
+  var x;
+  Base(this.x);
+}
+class Sub extends Base {
+  var y;
+  Sub(x, this.y) : super(x);
+}
+main() {
+  print(new Sub(1, 2).x);
+}""",
+r"""
+function(x, y) {
+  return new V.Sub(y, x);
+}"""),
+
+  const TestEntry.forMethod('generative_constructor_body(Sub#)', """
+class Base {
+  var x;
+  Base(this.x);
+}
+class Sub extends Base {
+  var y;
+  Sub(x, this.y) : super(x) {
+    print(x);
+  }
+}
+main() {
+  print(new Sub(1, 2).x);
+}""",
+r"""
+function(x, y) {
+  P.print(x);
+  return null;
+}"""),
+
+  const TestEntry.forMethod('generative_constructor(Sub#)', """
+class Base0 {
+  Base0() {
+    print('Base0');
+  }
+}
+class Base extends Base0 {
+  var x;
+  Base(this.x);
+}
+class Sub extends Base {
+  var y;
+  Sub(x, this.y) : super(x) {
+    print(x);
+  }
+}
+main() {
+  print(new Sub(1, 2).x);
+}""",
+r"""
+function(x, y) {
+  var v0;
+  v0 = new V.Sub(y, x);
+  v0.Base0$0();
+  v0.Sub$2(x, y);
+  return v0;
+}"""),
+
+  const TestEntry.forMethod('generative_constructor(Sub#)', """
+class Base0 {
+  Base0() {
+    print('Base0');
+  }
+}
+class Base extends Base0 {
+  var x;
+  Base(x1) : x = (() => ++x1) {
+    print(x1); // use boxed x1
+  }
+}
+class Sub extends Base {
+  var y;
+  Sub(x, this.y) : super(x) {
+    print(x);
+  }
+}
+main() {
+  print(new Sub(1, 2).x);
+}""",
+r"""
+function(x, y) {
+  var box_0, v0;
+  box_0 = {};
+  box_0.x1_0 = x;
+  v0 = new V.Sub(y, new V.Base_closure(box_0));
+  v0.Base0$0();
+  v0.Base$1(box_0);
+  v0.Sub$2(x, y);
+  return v0;
+}"""),
+];
+
+void main() {
+  runTests(tests);
+}