simplify constructors, fixes #564

test/codegen/expect/sunflower/sunflower.js

 dart_library.library('sunflower', null, /* Imports */[
   'dart_sdk'
 ], function(exports, dart_sdk) {
   'use strict';
   const core = dart_sdk.core;
   const html = dart_sdk.html;
   const math = dart_sdk.math;
   const dart = dart_sdk.dart;
   const dartx = dart_sdk.dartx;
   const sunflower = Object.create(null);
@@ skipping 46 matching lines @@
       let theta = i * painter.TAU / dart.notNull(sunflower.PHI);
       let r = dart.notNull(math.sqrt(i)) * sunflower.SCALE_FACTOR;
       let x = sunflower.centerX + r * dart.notNull(math.cos(theta));
       let y = sunflower.centerY - r * dart.notNull(math.sin(theta));
       new sunflower.SunflowerSeed(x, y, sunflower.SEED_RADIUS).draw(sunflower.context);
     }
     sunflower.notes[dartx.text] = `${sunflower.seeds} seeds`;
   };
   dart.fn(sunflower.draw, dart.void, []);
   circle.Circle = class Circle extends core.Object {
-    Circle(x, y, radius) {
+    new(x, y, radius) {
       this.x = x;
       this.y = y;
       this.radius = radius;
     }
   };
   dart.setSignature(circle.Circle, {
-    constructors: () => ({Circle: [circle.Circle, [core.num, core.num, core.num]]})
+    constructors: () => ({new: [circle.Circle, [core.num, core.num, core.num]]})
   });
   painter.CirclePainter = class CirclePainter extends core.Object {
-    CirclePainter() {
+    new() {
       this.color = painter.ORANGE;
     }
     draw(context) {
       context[dartx.beginPath]();
       context[dartx.lineWidth] = 2;
       context[dartx.fillStyle] = this.color;
       context[dartx.strokeStyle] = this.color;
       context[dartx.arc](this.x, this.y, this.radius, 0, painter.TAU, false);
       context[dartx.fill]();
       context[dartx.closePath]();
       context[dartx.stroke]();
     }
   };
   painter.CirclePainter[dart.implements] = () => [circle.Circle];
   dart.setSignature(painter.CirclePainter, {
     methods: () => ({draw: [dart.void, [html.CanvasRenderingContext2D]]})
   });
   sunflower.SunflowerSeed = class SunflowerSeed extends dart.mixin(circle.Circle, painter.CirclePainter) {
-    SunflowerSeed(x, y, radius, color) {
+    new(x, y, radius, color) {
       if (color === void 0) color = null;
-      super.Circle(x, y, radius);
+      super.new(x, y, radius);
       if (color != null) this.color = color;
     }
   };
   dart.setSignature(sunflower.SunflowerSeed, {
-    constructors: () => ({SunflowerSeed: [sunflower.SunflowerSeed, [core.num, core.num, core.num], [core.String]]})
+    constructors: () => ({new: [sunflower.SunflowerSeed, [core.num, core.num, core.num], [core.String]]})
   });
   painter.ORANGE = "orange";
   painter.RED = "red";
   painter.BLUE = "blue";
   painter.TAU = math.PI * 2;
   painter.querySelector = function(selector) {
     return html.document[dartx.querySelector](selector);
   };
   dart.fn(painter.querySelector, html.Element, [core.String]);
   dart.defineLazy(painter, {
     get canvas() {
       return dart.as(painter.querySelector("#canvas"), html.CanvasElement);
     }
   });
   dart.defineLazy(painter, {
     get context() {
       return dart.as(painter.canvas[dartx.getContext]('2d'), html.CanvasRenderingContext2D);
     }
   });
   // Exports:
   exports.sunflower = sunflower;
   exports.circle = circle;
   exports.painter = painter;
 });
 
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