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

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

Index: sdk/lib/_internal/pub/test/transformer/can_use_consume_primary_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_consume_primary_test.dart
similarity index 78%
copy from sdk/lib/_internal/pub/test/transformer/can_use_read_input_test.dart
copy to sdk/lib/_internal/pub/test/transformer/can_use_consume_primary_test.dart
index fba1eed718ec25ea170930a19ddaa6b9f38e3393..9b41b2bbc5905412e31e2c3d02224973d5b1ff64 100644
--- a/sdk/lib/_internal/pub/test/transformer/can_use_read_input_test.dart
+++ b/sdk/lib/_internal/pub/test/transformer/can_use_consume_primary_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.
 
@@ -19,8 +19,8 @@ class RewriteTransformer extends Transformer {
   String get allowedExtensions => '.txt';
 
   Future apply(Transform transform) {
-    return transform.readInput(transform.primaryInput.id).toList()
-        .then((contents) {
+    transform.consumePrimary();
+    return transform.primaryInput.readAsString().then((contents) {
       var id = transform.primaryInput.id.changeExtension(".out");
       var asset = new Asset.fromString(id, "\$contents.out");
       transform.addOutput(asset);
@@ -31,7 +31,7 @@ class RewriteTransformer extends Transformer {
 
 main() {
   initConfig();
-  integration("a transform can use readInputAsString", () {
+  integration("a transform can use consumePrimary", () {
     d.dir(appPath, [
       d.pubspec({
         "name": "myapp",
@@ -48,7 +48,8 @@ main() {
     createLockFile('myapp', pkg: ['barback']);
 
     pubServe();
-    requestShouldSucceed("foo.out", "[[102, 111, 111]].out");
+    requestShouldSucceed("foo.out", "foo.out");
+    requestShould404("foo.txt");
     endPubServe();
   });
 }