Add Cupertino icon fonts helper and dependency for default template (#12559)

* add CupertinoIcons

* Use new font name convention

* review

packages/flutter/lib/cupertino.dart

@@ -12,6 +12,7 @@ export 'src/cupertino/bottom_tab_bar.dart';
 export 'src/cupertino/button.dart';
 export 'src/cupertino/colors.dart';
 export 'src/cupertino/dialog.dart';
+export 'src/cupertino/icons.dart';
 export 'src/cupertino/nav_bar.dart';
 export 'src/cupertino/page_scaffold.dart';
 export 'src/cupertino/route.dart';

packages/flutter/lib/src/cupertino/icons.dart

+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import 'package:flutter/widgets.dart';
+
+/// Identifiers for the supported Cupertino icons.
+///
+/// Use with the [Icon] class to show specific icons.
+///
+/// Icons are identified by their name as listed below.
+///
+/// To use this class, make sure you add a dependency on `cupertino_icons` in your
+/// project's `pubspec.yaml` file. This ensures that the CupertinoIcons font is
+/// included in your application. This font is used to display the icons. For example:
+///
+/// ```yaml
+/// name: my_awesome_application
+///
+/// dependencies:
+///   cupertino_icons: ^0.1.0
+/// ```
+///
+/// See also:
+///
+///  * [Icon]
+class CupertinoIcons {
+  CupertinoIcons._();
+
+  static const String iconFont = 'packages/cupertino_icons/CupertinoIcons';
+
+  // Manually maintained list
+
+  static const IconData left_chevron = const IconData(0xf3f0, fontFamily: iconFont);
+
+  static const IconData right_chevron = const IconData(0xf3f2, fontFamily: iconFont);
+
+  static const IconData share = const IconData(0xf4ca, fontFamily: iconFont);
+
+  static const IconData book = const IconData(0xf3e7, fontFamily: iconFont);
+
+  static const IconData info = const IconData(0xf44c, fontFamily: iconFont);
+
+  static const IconData reply = const IconData(0xf4c6, fontFamily: iconFont);
+
+  static const IconData conversation_bubble = const IconData(0xf3fb, fontFamily: iconFont);
+
+  static const IconData profile_circled = const IconData(0xf419, fontFamily: iconFont);
+
+  static const IconData plus_circled = const IconData(0xf48a, fontFamily: iconFont);
+
+  static const IconData minus_circled = const IconData(0xf463, fontFamily: iconFont);
+
+  static const IconData flag = const IconData(0xf42c, fontFamily: iconFont);
+
+  static const IconData search = const IconData(0xf4c6, fontFamily: iconFont);
+
+  static const IconData check_mark = const IconData(0xf41e, fontFamily: iconFont);
+
+  static const IconData check_mark_circled = const IconData(0xf41f, fontFamily: iconFont);
+}
\ No newline at end of file

packages/flutter_tools/templates/create/pubspec.yaml.tmpl

@@ -5,6 +5,10 @@ dependencies:
   flutter:
     sdk: flutter
 
+  # The following adds the Cupertino Icons font to your application.
+  # Use with the CupertinoIcons class for iOS style icons.
+  cupertino_icons: ^0.1.0
+
 dev_dependencies:
   flutter_test:
     sdk: flutter
@@ -26,7 +30,7 @@ flutter:
 
   # The following line ensures that the Material Icons font is
   # included with your application, so that you can use the icons in
-  # the Icons class.
+  # the material Icons class.
   uses-material-design: true
 
   # To add assets to your application, add an assets section, like this:
@@ -39,7 +43,7 @@ flutter:
 
   # For details regarding adding assets from package dependencies, see
   # https://flutter.io/assets-and-images/#from-packages
-  
+
   # To add custom fonts to your application, add a fonts section here,
   # in this "flutter" section. Each entry in this list should have a
   # "family" key with the font family name, and a "fonts" key with a