update closure-compiler to version 20160315.2.0. add java flags.

build/Gruntfile.js

@@ -23,7 +23,7 @@
  *
 */
 module.exports = function(grunt) {
-	require('google-closure-compiler').grunt(grunt);
+	require('google-closure-compiler').grunt(grunt, ['-Xms2048m']);
     var revision="unknown", defaultConfig, packageFile;
 	var path = grunt.option('src') || './configs';
 	var level = grunt.option('level') || 'ADVANCED';
@@ -183,10 +183,6 @@ module.exports = function(grunt) {
 		if (grunt.option('desktop')) {
 			srcFiles = srcFiles.concat(packageFile['compile']['sdk']['desktop']);
 		}
-	
-		
-		var cc = require('google-closure-compiler').compiler;
-		cc.prototype.spawnOptions = {env: {'JAVA_OPTS': '-Xms2048m'}};
 
 		grunt.initConfig({
 			pkg: packageFile,

build/package.json

@@ -4,7 +4,7 @@
   "homepage": "http://www.teamlab.com",
   "private": true,
   "dependencies": {
-    "google-closure-compiler": "^20160315.0.0",
+    "google-closure-compiler": "20160315.2.0",
     "grunt": "0.4.5",
     "grunt-contrib-clean": "0.5.0",
     "grunt-contrib-concat": "0.3.0",