Fix: ES5 bugs

src/game/lib/chart.js

@@ -23,7 +23,7 @@ Chart.prototype.drawRecordGraph = function(index, date, bestRecord, min, max) {
 
 	this.drawText(
 		posX, posY - Chart.CHART_HEIGHT - Chart.CHART_RECORD_OFFSET_Y,
-		StringUtil.getRecordTextWithoutUnit(bestRecord) + StringUtil.getScoreUnit(sessionStorageManager.playingAppID),
+		StringUtil.getRecordTextWithoutUnit(bestRecord) + StringUtil.getScoreUnit(sessionStorageManager.playingAppID)
 	);
 
 	// chart

src/game/lib/history_record_manager.js

@@ -72,7 +72,11 @@ HistoryRecordManager.prototype.upperValueForGraph = function() {
 
 HistoryRecordManager.prototype.getBestRecordArray = function() {
 	var numberArray = [];
-	for(var data of this.historyRecords) {
+	// for(var data of this.historyRecords) {
+	// 	numberArray.push(data.bestRecord);
+	// }
+	for(var i = 0; i < this.historyRecords.count; i++) {
+		var data = this.historyRecords[i];
 		numberArray.push(data.bestRecord);
 	}
 	return numberArray;