fixes #427, static fields emitted outside the scope of their class

test/codegen/expect/sunflower/sunflower.js

 dart_library.library('sunflower/sunflower', null, /* Imports */[
   'dart/_runtime',
   'sunflower/dom',
   'dart/core',
   'dart/math',
   'sunflower/painter',
   'sunflower/circle'
 ], /* Lazy imports */[
 ], function(exports, dart, dom, core, math, painter, circle) {
   'use strict';
   let dartx = dart.dartx;
   const SEED_RADIUS = 2;
   const SCALE_FACTOR = 4;
   const MAX_D = 300;
   const centerX = dart.notNull(MAX_D) / 2;
   const centerY = centerX;
   function querySelector(selector) {
     return dom.document.querySelector(selector);
   }
   dart.fn(querySelector, dom.Element, [core.String]);
-  exports.seeds = 0;
   dart.defineLazyProperties(exports, {
     get canvas() {
       return dart.as(querySelector("#canvas"), dom.CanvasElement);
-    },
+    }
+  });
+  dart.defineLazyProperties(exports, {
     get context() {
       return dart.as(exports.canvas.getContext('2d'), dom.CanvasRenderingContext2D);
-    },
+    }
+  });
+  dart.defineLazyProperties(exports, {
     get slider() {
       return dart.as(querySelector("#slider"), dom.InputElement);
-    },
+    }
+  });
+  dart.defineLazyProperties(exports, {
     get notes() {
       return querySelector("#notes");
-    },
+    }
+  });
+  dart.defineLazyProperties(exports, {
     get PHI() {
       return (dart.notNull(math.sqrt(5)) + 1) / 2;
     }
   });
+  exports.seeds = 0;
   function main() {
     exports.slider.addEventListener('change', dart.fn(e => draw(), dart.void, [dom.Event]));
     draw();
   }
   dart.fn(main, dart.void, []);
   function draw() {
     exports.seeds = core.int.parse(exports.slider.value);
     exports.context.clearRect(0, 0, MAX_D, MAX_D);
     for (let i = 0; dart.notNull(i) < dart.notNull(exports.seeds); i = dart.notNull(i) + 1) {
       let theta = dart.notNull(i) * dart.notNull(painter.TAU) / dart.notNull(exports.PHI);
@@ skipping 19 matching lines @@
   exports.SEED_RADIUS = SEED_RADIUS;
   exports.SCALE_FACTOR = SCALE_FACTOR;
   exports.MAX_D = MAX_D;
   exports.centerX = centerX;
   exports.centerY = centerY;
   exports.querySelector = querySelector;
   exports.main = main;
   exports.draw = draw;
   exports.SunflowerSeed = SunflowerSeed;
 });