Revert commits r33138, r33135, and r33134.

pkg/barback/test/package_graph/get_all_assets_test.dart

Index: pkg/barback/test/package_graph/get_all_assets_test.dart
diff --git a/pkg/barback/test/package_graph/get_all_assets_test.dart b/pkg/barback/test/package_graph/get_all_assets_test.dart
index 7cadbdfb17b61b6d67340de4278bd4a0a240863b..0ece84baa09579cd02c26d3f1dab37f9620e8d9d 100644
--- a/pkg/barback/test/package_graph/get_all_assets_test.dart
+++ b/pkg/barback/test/package_graph/get_all_assets_test.dart
@@ -18,24 +18,24 @@ main() {
     buildShouldSucceed();
   });
 
-  test("includes transformed outputs", () {
+  test("includes transformed outputs, but not consumed ones", () {
     initGraph(["app|a.txt", "app|foo.blub"], {"app": [
       [new RewriteTransformer("blub", "blab")]
     ]});
     updateSources(["app|a.txt", "app|foo.blub"]);
-    expectAllAssets(["app|a.txt", "app|foo.blub", "app|foo.blab"]);
+    expectAllAssets(["app|a.txt", "app|foo.blab"]);
     buildShouldSucceed();
   });
 
-  test("includes overwritten outputs", () {
-    initGraph(["app|a.txt", "app|foo.blub"], {"app": [
-      [new RewriteTransformer("blub", "blub")]
-    ]});
-    updateSources(["app|a.txt", "app|foo.blub"]);
-    expectAllAssets({
-      "app|a.txt": "a",
-      "app|foo.blub": "foo.blub"
-    });
+  test("includes non-primary inputs to transformers", () {
+    var transformer = new ManyToOneTransformer("txt");
+    initGraph({
+      "app|a.txt": "a.inc",
+      "app|a.inc": "a"
+    }, {"app": [[transformer]]});
+
+    updateSources(["app|a.txt", "app|a.inc"]);
+    expectAllAssets(["app|a.inc", "app|a.out"]);
     buildShouldSucceed();
   });