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

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

Index: sdk/lib/_internal/pub/test/version_solver_test.dart
diff --git a/sdk/lib/_internal/pub/test/version_solver_test.dart b/sdk/lib/_internal/pub/test/version_solver_test.dart
index 0a8da4c305945ab25f8c1c0e5e999eeb4a2c7918..ae2a8a9ba8771c22d3114ba3e9145d4f448fffca 100644
--- a/sdk/lib/_internal/pub/test/version_solver_test.dart
+++ b/sdk/lib/_internal/pub/test/version_solver_test.dart
@@ -2,7 +2,7 @@
 // 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_update_test;
+library pub_upgrade_test;
 
 import 'dart:async';
 
@@ -1130,7 +1130,7 @@ class MockSource extends Source {
     });
   }
 
-  Future<bool> install(PackageId id, String path) {
+  Future<bool> get(PackageId id, String path) {
     throw new Exception('no');
   }