Rename "install" -> "get" and "update" -> "upgrade".

sdk/lib/_internal/pub/test/pub_get_and_upgrade_test.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library pub_tests;
 
 import 'package:scheduled_test/scheduled_test.dart';
 
 import 'descriptor.dart' as d;
 import 'test_pub.dart';
 
 main() {
   initConfig();
 
-  forBothPubInstallAndUpdate((command) {
+  forBothPubGetAndUpgrade((command) {
     group('requires', () {
       integration('a pubspec', () {
         d.dir(appPath, []).create();
 
         pubCommand(command,
             error: new RegExp(r'Could not find a file named "pubspec.yaml" '
                 r'in "[^\n]*"\.'));
       });
 
       integration('a pubspec with a "name" key', () {
@@ skipping 106 matching lines @@
             "myapp": {"path": "."}
           }
         })
       ]).create();
 
       pubCommand(command, error: new RegExp(r'"dev_dependencies.myapp": '
           r'Package may not list itself as a dependency\.'));
     });
   });
 }