Use real "package:" imports in pub's plugin-loading code.

sdk/lib/_internal/pub/test/transformer/can_use_has_input_test.dart

Index: sdk/lib/_internal/pub/test/transformer/can_use_has_input_test.dart
diff --git a/sdk/lib/_internal/pub/test/transformer/can_use_read_input_test.dart b/sdk/lib/_internal/pub/test/transformer/can_use_has_input_test.dart
similarity index 69%
copy from sdk/lib/_internal/pub/test/transformer/can_use_read_input_test.dart
copy to sdk/lib/_internal/pub/test/transformer/can_use_has_input_test.dart
index fba1eed718ec25ea170930a19ddaa6b9f38e3393..543bf01f833e52d526d3e1356da90c82a576b9c2 100644
--- a/sdk/lib/_internal/pub/test/transformer/can_use_read_input_test.dart
+++ b/sdk/lib/_internal/pub/test/transformer/can_use_has_input_test.dart
@@ -1,4 +1,4 @@
-// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS d.file
+// Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS d.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.
 
@@ -19,10 +19,13 @@ class RewriteTransformer extends Transformer {
   String get allowedExtensions => '.txt';
 
   Future apply(Transform transform) {
-    return transform.readInput(transform.primaryInput.id).toList()
-        .then((contents) {
+    return Future.wait([
+      transform.hasInput(transform.primaryInput.id),
+      transform.hasInput(new AssetId('hooble', 'whatsit'))
+    ]).then((results) {
       var id = transform.primaryInput.id.changeExtension(".out");
-      var asset = new Asset.fromString(id, "\$contents.out");
+      var asset = new Asset.fromString(id,
+          "primary: \${results[0]}, secondary: \${results[1]}");
       transform.addOutput(asset);
     });
   }
@@ -31,7 +34,7 @@ class RewriteTransformer extends Transformer {
 
 main() {
   initConfig();
-  integration("a transform can use readInputAsString", () {
+  integration("a transform can use hasInput", () {
     d.dir(appPath, [
       d.pubspec({
         "name": "myapp",
@@ -48,7 +51,7 @@ main() {
     createLockFile('myapp', pkg: ['barback']);
 
     pubServe();
-    requestShouldSucceed("foo.out", "[[102, 111, 111]].out");
+    requestShouldSucceed("foo.out", "primary: true, secondary: false");
     endPubServe();
   });
 }