Fix missing override in Outliner

Change-Id: I1481d87781537c792dcf4b7a17e483ebf4c363c7
diff --git a/src/main/java/com/android/tools/r8/ir/optimize/OutlinerImpl.java b/src/main/java/com/android/tools/r8/ir/optimize/OutlinerImpl.java
index 958d8ac..bbfb39d 100644
--- a/src/main/java/com/android/tools/r8/ir/optimize/OutlinerImpl.java
+++ b/src/main/java/com/android/tools/r8/ir/optimize/OutlinerImpl.java
@@ -128,7 +128,7 @@
 
   private final AppView<AppInfoWithLiveness> appView;
   private final InliningConstraints inliningConstraints;
-  
+
   private abstract static class OutlineInstruction {
 
     // Value signaling that this is the one allowed temporary register for an outline.
@@ -1385,6 +1385,7 @@
         executorService);
   }
 
+  @Override
   public void rewriteWithLens() {
     // Rewrite the outline collection with the graph lens, such that the reprocessing of methods
     // will correctly delete/rewrite entries in the outline collection.