Store the async-await compiled pub code directly in the repo.

sdk/lib/_internal/pub_generated/test/transformers_needed_by_transformers/dev_transformers_test.dart

+library pub_tests;
+import '../descriptor.dart' as d;
+import '../test_pub.dart';
+import 'utils.dart';
+void main() {
+  initConfig();
+  integration(
+      "doesn't return a dependency's transformer that can't run on lib",
+      () {
+    d.dir(appPath, [d.pubspec({
+        "name": "myapp",
+        "dependencies": {
+          "foo": {
+            "path": "../foo"
+          }
+        }
+      })]).create();
+    d.dir("foo", [d.pubspec({
+        "name": "foo",
+        "version": "1.0.0",
+        "transformers": [{
+            "foo": {
+              "\$include": "test/foo_test.dart"
+            }
+          }]
+      }),
+          d.dir("lib", [d.file("foo.dart", transformer())]),
+          d.dir("test", [d.file("foo_test.dart", "")])]).create();
+    expectDependencies({});
+  });
+  integration(
+      "does return the root package's transformer that can't run on " "lib",
+      () {
+    d.dir(appPath, [d.pubspec({
+        "name": "myapp",
+        "transformers": [{
+            "myapp": {
+              "\$include": "test/myapp_test.dart"
+            }
+          }]
+      }),
+          d.dir("lib", [d.file("myapp.dart", transformer())]),
+          d.dir("test", [d.file("myapp_test.dart", "")])]).create();
+    expectDependencies({
+      "myapp": []
+    });
+  });
+  integration(
+      "doesn't return a dependency's transformer that can run on bin",
+      () {
+    d.dir(appPath, [d.pubspec({
+        "name": "myapp",
+        "dependencies": {
+          "foo": {
+            "path": "../foo"
+          }
+        }
+      })]).create();
+    d.dir("foo", [d.pubspec({
+        "name": "foo",
+        "version": "1.0.0",
+        "transformers": [{
+            "foo": {
+              "\$include": "bin/foo.dart"
+            }
+          }]
+      }),
+          d.dir("lib", [d.file("foo.dart", transformer())]),
+          d.dir("test", [d.file("foo_test.dart", "")])]).create();
+    expectDependencies({
+      "foo": []
+    });
+  });
+}