[101] Removed legacy 'new' and 'const' from 101 starter codelab (#72)

Author: tianlunlee

mdc_100_series/lib/login.dart

@@ -16,27 +16,27 @@ import 'package:flutter/material.dart';
 
 class LoginPage extends StatefulWidget {
   @override
-  _LoginPageState createState() => new _LoginPageState();
+  _LoginPageState createState() => _LoginPageState();
 }
 
 class _LoginPageState extends State<LoginPage> {
   // TODO: Add text editing controllers (101)
   @override
   Widget build(BuildContext context) {
-    return new Scaffold(
-      body: new SafeArea(
-        child: new ListView(
-          padding: const EdgeInsets.symmetric(horizontal: 24.0),
+    return Scaffold(
+      body: SafeArea(
+        child: ListView(
+          padding: EdgeInsets.symmetric(horizontal: 24.0),
           children: <Widget>[
-            const SizedBox(height: 80.0),
-            new Column(
+            SizedBox(height: 80.0),
+            Column(
               children: <Widget>[
-                new Image.asset('assets/diamond.png'),
-                const SizedBox(height: 16.0),
-                const Text('SHRINE'),
+                Image.asset('assets/diamond.png'),
+                SizedBox(height: 16.0),
+                Text('SHRINE'),
               ],
             ),
-            const SizedBox(height: 120.0),
+            SizedBox(height: 120.0),
             // TODO: Wrap Username with PrimaryColorOverride (103)
             // TODO: Remove filled: true values (103)
             // TODO: Wrap Password with PrimaryColorOverride (103)
@@ -49,4 +49,4 @@ class _LoginPageState extends State<LoginPage> {
   }
 }
 
-// TODO: Add PrimaryColorOverride (103)
+// TODO: Add PrimaryColorOverride (103)

mdc_100_series/lib/model/data.dart

@@ -15,7 +15,7 @@
 import 'product.dart';
 
 List<Product> getProducts(Category category) {
-  const allProducts = <Product>[
+  allProducts = <Product>[
     Product(
       category: Category.accessories,
       id: 0,
@@ -291,4 +291,3 @@ List<Product> getProducts(Category category) {
     }).toList();
   }
 }
-

mdc_100_series/lib/model/product.dart

@@ -17,7 +17,7 @@ import 'package:flutter/foundation.dart';
 enum Category { all, accessories, clothing, home, }
 
 class Product {
-  const Product({
+  Product({
     @required this.category,
     @required this.id,
     @required this.isFeatured,

mdc_100_series/lib/supplemental/asymmetric_view.dart

@@ -20,11 +20,11 @@ import 'product_columns.dart';
 class AsymmetricView extends StatelessWidget {
   final List<Product> products;
 
-  const AsymmetricView({Key key, this.products});
+  AsymmetricView({Key key, this.products});
 
   List<Container> _buildColumns(BuildContext context) {
     if (products == null || products.isEmpty) {
-      return const <Container>[];
+      return <Container>[];
     }
 
     /// This will return a list of columns. It will oscillate between the two