Add SkylarkImportLookupFunction to WorkspaceFileFunction.

PiperOrigin-RevId: 229237786
diff --git a/src/test/java/com/google/devtools/build/lib/skyframe/PackageLookupFunctionTest.java b/src/test/java/com/google/devtools/build/lib/skyframe/PackageLookupFunctionTest.java
index d4ae4a6..f20e650 100644
--- a/src/test/java/com/google/devtools/build/lib/skyframe/PackageLookupFunctionTest.java
+++ b/src/test/java/com/google/devtools/build/lib/skyframe/PackageLookupFunctionTest.java
@@ -146,7 +146,8 @@
                     ImmutableList.<EnvironmentExtension>of(
                         new PackageFactory.EmptyEnvironmentExtension()))
                 .build(ruleClassProvider, fileSystem),
-            directories));
+            directories,
+            /*skylarkImportLookupFunctionForInlining=*/ null));
     skyFunctions.put(SkyFunctions.EXTERNAL_PACKAGE, new ExternalPackageFunction());
     skyFunctions.put(SkyFunctions.LOCAL_REPOSITORY_LOOKUP, new LocalRepositoryLookupFunction());
     skyFunctions.put(