Revert "Use native async/await support in pub."

sdk/lib/_internal/pub_generated/test/build/handles_long_paths_test.dart

Index: sdk/lib/_internal/pub_generated/test/build/handles_long_paths_test.dart
diff --git a/sdk/lib/_internal/pub/test/build/handles_long_paths_test.dart b/sdk/lib/_internal/pub_generated/test/build/handles_long_paths_test.dart
similarity index 66%
copy from sdk/lib/_internal/pub/test/build/handles_long_paths_test.dart
copy to sdk/lib/_internal/pub_generated/test/build/handles_long_paths_test.dart
index 3b8b17b60e42b010a5811eccead0111cddef2dc4..094938e9d4a41fc3de406b26f7a087d8826976ef 100644
--- a/sdk/lib/_internal/pub/test/build/handles_long_paths_test.dart
+++ b/sdk/lib/_internal/pub_generated/test/build/handles_long_paths_test.dart
@@ -31,43 +31,38 @@ main() {
     // timeout to cope with that.
     currentSchedule.timeout *= 3;
 
-    d.dir("some_long_dependency_name", [
-      d.libPubspec("foo", "0.0.1"),
-      d.dir("lib", [
-        d.file("foo.txt", "foo")
-      ])
-    ]).create();
+    d.dir(
+        "some_long_dependency_name",
+        [
+            d.libPubspec("foo", "0.0.1"),
+            d.dir("lib", [d.file("foo.txt", "foo")])]).create();
 
     // Build a 2,800 character (non-canonicalized) path.
     var longPath = "";
-    for (var i = 0; i < 100; i++)
-    {
+    for (var i = 0; i < 100; i++) {
       longPath = path.join(longPath, "..", "some_long_dependency_name");
     }
 
-    d.dir(appPath, [
-      d.appPubspec({
-        "foo": {"path": longPath}
-      }),
-      d.dir("web", [
-        d.file("index.html", "html"),
-      ])
-    ]).create();
+    d.dir(appPath, [d.appPubspec({
+        "foo": {
+          "path": longPath
+        }
+      }), d.dir("web", [d.file("index.html", "html"),])]).create();
 
-    schedulePub(args: ["build"],
+    schedulePub(
+        args: ["build"],
         output: new RegExp(r'Built 2 files to "build".'));
 
-    d.dir(appPath, [
-      d.dir('build', [
-        d.dir('web', [
-          d.file("index.html", "html"),
-          d.dir('packages', [
-            d.dir('foo', [
-              d.file('foo.txt', 'foo')
-            ])
-          ])
-        ])
-      ])
-    ]).validate();
+    d.dir(
+        appPath,
+        [
+            d.dir(
+                'build',
+                [
+                    d.dir(
+                        'web',
+                        [
+                            d.file("index.html", "html"),
+                            d.dir('packages', [d.dir('foo', [d.file('foo.txt', 'foo')])])])])]).validate();
   });
 }