Fix a bug where pub would fail to load a transformer.

If a transformer is defined in a dependency, used in the root package,
and restricted (via $include or $exclude) to only run on files in
test/, pub will think it's not necessary and fail to load it.

R=rnystrom@google.com

Review URL: https://codereview.chromium.org//1052353003

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@44876 260f80e4-7a28-3924-810f-c04153c831b5

lib/src/barback/dependency_computer.dart

@@ -75,7 +75,7 @@ class DependencyComputer {
           return phase.expand((config) {
             var id = config.id;
             if (id.isBuiltInTransformer) return [];
-            if (id.package != _graph.entrypoint.root.name &&
+            if (package.name != _graph.entrypoint.root.name &&
                 !config.canTransformPublicFiles) {
               return [];
             }

test/dependency_computer/dev_transformers_test.dart

@@ -47,6 +47,28 @@ void main() {
     expectDependencies({"myapp": []});
   });
 
+  integration("does return a dependency's transformer that the root package "
+      "uses", () {
+    d.dir(appPath, [
+      d.pubspec({
+        "name": "myapp",
+        "dependencies": {"foo": {"path": "../foo"}},
+        "transformers": [{"foo": {"\$include": "test/myapp_test.dart"}}]
+      }),
+      d.dir("test", [d.file("myapp_test.dart", "")])
+    ]).create();
+
+    d.dir("foo", [
+      d.pubspec({
+        "name": "foo",
+        "version": "1.0.0"
+      }),
+      d.dir("lib", [d.file("foo.dart", transformer())])
+    ]).create();
+
+    expectDependencies({"foo": []});
+  });
+
   integration("doesn't return a dependency's transformer that can run on bin",
       () {
     d.dir(appPath, [