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

sdk/lib/_internal/pub/test/hosted/offline_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 '../descriptor.dart' as d;
 import '../test_pub.dart';
 
 main() {
   initConfig();
 
-  forBothPubInstallAndUpdate((command) {
-    integration('updates a package using the cache', () {
+  forBothPubGetAndUpgrade((command) {
+    integration('upgrades a package using the cache', () {
       // Run the server so that we know what URL to use in the system cache.
       servePackages([]);
 
       d.cacheDir({
         "foo": ["1.2.2", "1.2.3"],
         "bar": ["1.2.3"]
       }, includePubspecs: true).create();
 
       d.appDir({
         "foo": "any",
         "bar": "any"
       }).create();
 
       var warning = null;
-      if (command == RunCommand.update) {
-        warning = "Warning: Updating when offline may not update you "
+      if (command == RunCommand.upgrade) {
+        warning = "Warning: Upgrading when offline may not update you "
                   "to the latest versions of your dependencies.";
       }
 
       pubCommand(command, args: ['--offline'], warning: warning);
 
       d.packagesDir({
         "foo": "1.2.3",
         "bar": "1.2.3"
       }).validate();
     });
@@ skipping 17 matching lines @@
       }, includePubspecs: true).create();
 
       d.appDir({"foo": ">2.0.0"}).create();
 
       pubCommand(command, args: ['--offline'], error:
           "Package 'foo' has no versions that match >2.0.0 derived from:\n"
           "- 'myapp' depends on version >2.0.0");
     });
   });
 }