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

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

 // Copyright (c) 2013, 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.
 
 /// Pub-specific scheduled_test descriptors.
 library descriptor;
 
 import 'package:oauth2/oauth2.dart' as oauth2;
 import 'package:scheduled_test/scheduled_server.dart';
 import 'package:scheduled_test/descriptor.dart';
@@ skipping 79 matching lines @@
     dir('info'),
     dir('objects'),
     dir('refs')
   ]));
 }
 
 /// Describes the `packages/` directory containing all the given [packages],
 /// which should be name/version pairs. The packages will be validated against
 /// the format produced by the mock package server.
 ///
-/// A package with a null version should not be installed.
+/// A package with a null version should not be downloaded.
 Descriptor packagesDir(Map<String, String> packages) {
   var contents = <Descriptor>[];
   packages.forEach((name, version) {
     if (version == null) {
       contents.add(nothing(name));
     } else {
       contents.add(dir(name, [
         file("$name.dart", 'main() => "$name $version";')
       ]));
     }
   });
   return dir(packagesPath, contents);
 }
 
 /// Describes the global package cache directory containing all the given
 /// [packages], which should be name/version pairs. The packages will be
 /// validated against the format produced by the mock package server.
 ///
 /// A package's value may also be a list of versions, in which case all
-/// versions are expected to be installed.
+/// versions are expected to be downloaded.
 ///
 /// If [includePubspecs] is `true`, then pubspecs will be created for each
 /// package. Defaults to `false` so that the contents of pubspecs are not
 /// validated since they will often lack the dependencies section that the
 /// real pubspec being compared against has. You usually only need to pass
 /// `true` for this if you plan to call [create] on the resulting descriptor.
 Descriptor cacheDir(Map packages, {bool includePubspecs: false}) {
   var contents = <Descriptor>[];
   packages.forEach((name, versions) {
     if (versions is! List) versions = [versions];
@@ skipping 30 matching lines @@
           ['https://www.googleapis.com/auth/userinfo.email'],
           expiration).toJson())
     ]);
   }));
 }
 
 /// Describes the application directory, containing only a pubspec specifying
 /// the given [dependencies].
 DirectoryDescriptor appDir([Map dependencies]) =>
   dir(appPath, [appPubspec(dependencies)]);