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pkg/compiler/lib/src/kernel/kernel_strategy.dart

Index: pkg/compiler/lib/src/kernel/kernel_strategy.dart
diff --git a/pkg/compiler/lib/src/kernel/kernel_strategy.dart b/pkg/compiler/lib/src/kernel/kernel_strategy.dart
index 844459dbcde5d2b5e1142dccafc2f0b0125b1948..33dbafbcf75cf402f53a221697e0ba35ffc05171 100644
--- a/pkg/compiler/lib/src/kernel/kernel_strategy.dart
+++ b/pkg/compiler/lib/src/kernel/kernel_strategy.dart
@@ -181,7 +181,10 @@ class MirrorsDataBuilderImpl extends MirrorsDataImpl {
 
   @override
   void computeMembersNeededForReflection(
-      ResolutionWorldBuilder worldBuilder, ClosedWorld closedWorld) {}
+      ResolutionWorldBuilder worldBuilder, ClosedWorld closedWorld) {
+    // TODO(johnniwinther): Support dart:mirrors.
+    createImmutableSets();
+  }
 
   @override
   void maybeMarkClosureAsNeededForReflection(
@@ -239,12 +242,12 @@ class MirrorsResolutionAnalysisImpl implements MirrorsResolutionAnalysis {
 class MirrorsCodegenAnalysisImpl implements MirrorsCodegenAnalysis {
   @override
   int get preMirrorsMethodCount {
-    throw new UnimplementedError(
-        'MirrorsCodegenAnalysisImpl.preMirrorsMethodCount');
+    // TODO(johnniwinther): Implement this.
+    return null;
   }
 
   @override
   void onQueueEmpty(Enqueuer enqueuer, Iterable<ClassEntity> recentClasses) {
-    throw new UnimplementedError('MirrorsCodegenAnalysisImpl.onQueueEmpty');
+    // TODO(johnniwinther): Implement this.
   }
 }