Find “browser” dependency even if it’s dev or override.

sdk/lib/_internal/pub/test/build/utils.dart

+// Copyright (c) 2013, 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.
+
+import 'dart:convert';
+
+import '../descriptor.dart' as d;
+import '../test_pub.dart';
+
+/// Runs the hosted test server and serves a valid "browser" package that
+/// contains the same files (but not their contents) as the real browser
+/// package.
+void serveBrowserPackage() {
+  serve([
+    d.dir('api', [
+      d.dir('packages', [
+        d.file('browser', JSON.encode({
+          'versions': [packageVersionApiMap(packageMap('browser', '1.0.0'))]
+        })),
+        d.dir('browser', [
+          d.dir('versions', [
+            d.file('1.0.0', JSON.encode(
+                packageVersionApiMap(
+                    packageMap('browser', '1.0.0'),
+                    full: true)))
+          ])
+        ])
+      ])
+    ]),
+    d.dir('packages', [
+      d.dir('browser', [
+        d.dir('versions', [
+          d.tar('1.0.0.tar.gz', [
+            d.file('pubspec.yaml', yaml(packageMap("browser", "1.0.0"))),
+            d.dir('lib', [
+              d.file('dart.js', 'contents of dart.js'),
+              d.file('interop.js', 'contents of interop.js')
+            ])
+          ])
+        ])
+      ])
+    ])
+  ]);
+}