Precompile immutable globally-installed pub executables.

sdk/lib/_internal/pub/test/global/deactivate/removes_precompiled_snapshots_test.dart

Index: sdk/lib/_internal/pub/test/global/deactivate/removes_precompiled_snapshots_test.dart
diff --git a/sdk/lib/_internal/pub/test/global/deactivate/hosted_package_test.dart b/sdk/lib/_internal/pub/test/global/deactivate/removes_precompiled_snapshots_test.dart
similarity index 73%
copy from sdk/lib/_internal/pub/test/global/deactivate/hosted_package_test.dart
copy to sdk/lib/_internal/pub/test/global/deactivate/removes_precompiled_snapshots_test.dart
index 240a11b4ea3f484644931f43976bc2128d2b9584..482a3f41d849716459d3c8e70cdb16d6551cc1b6 100644
--- a/sdk/lib/_internal/pub/test/global/deactivate/hosted_package_test.dart
+++ b/sdk/lib/_internal/pub/test/global/deactivate/removes_precompiled_snapshots_test.dart
@@ -2,16 +2,21 @@
 // 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.
 
+import '../../descriptor.dart' as d;
 import '../../test_pub.dart';
 
 main() {
   initConfig();
-  integration('deactivates an active hosted package', () {
+  integration('removes precompiled snapshots', () {
     servePackages((builder) => builder.serve("foo", "1.0.0"));
 
     schedulePub(args: ["global", "activate", "foo"]);
 
     schedulePub(args: ["global", "deactivate", "foo"],
         output: "Deactivated package foo 1.0.0.");
+
+    d.dir(cachePath, [
+      d.dir('global_packages', [d.nothing('foo')])
+    ]).validate();
   });
 }