Expand tree artifacts in BEP.

Unconditionally expand the tree artifacts in CompletionFunction so we can resolve them in BEP.

RELNOTES: None
PiperOrigin-RevId: 251454593
diff --git a/src/test/java/com/google/devtools/build/lib/analysis/TargetCompleteEventTest.java b/src/test/java/com/google/devtools/build/lib/analysis/TargetCompleteEventTest.java
index ea48bb3..77b4a08 100644
--- a/src/test/java/com/google/devtools/build/lib/analysis/TargetCompleteEventTest.java
+++ b/src/test/java/com/google/devtools/build/lib/analysis/TargetCompleteEventTest.java
@@ -17,7 +17,7 @@
 import static com.google.common.truth.Truth.assertThat;
 
 import com.google.common.collect.Iterables;
-import com.google.devtools.build.lib.actions.ArtifactPathResolver;
+import com.google.devtools.build.lib.actions.CompletionContext;
 import com.google.devtools.build.lib.analysis.TopLevelArtifactHelper.ArtifactsToBuild;
 import com.google.devtools.build.lib.analysis.util.AnalysisTestCase;
 import com.google.devtools.build.lib.buildeventstream.BuildEvent;
@@ -49,7 +49,7 @@
     TargetCompleteEvent event =
         TargetCompleteEvent.successfulBuild(
             ctAndData,
-            ArtifactPathResolver.IDENTITY,
+            CompletionContext.FAILED_COMPLETION_CTX,
             artifactsToBuild.getAllArtifactsByOutputGroup());
     assertThat(event.referencedLocalFiles())
         .contains(