Add ClosureRepresentationInfo, the new public face of ClosureClassMap

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

Index: pkg/compiler/lib/src/kernel/kernel_backend_strategy.dart
diff --git a/pkg/compiler/lib/src/kernel/kernel_backend_strategy.dart b/pkg/compiler/lib/src/kernel/kernel_backend_strategy.dart
index c5ef1b1d31a79a39f81082353ad68e4b7edb0cef..e8212576331bdd7e285783c0131b74374553c6cc 100644
--- a/pkg/compiler/lib/src/kernel/kernel_backend_strategy.dart
+++ b/pkg/compiler/lib/src/kernel/kernel_backend_strategy.dart
@@ -313,20 +313,6 @@ class KLocal implements Local {
 class KernelClosureClassMaps implements ClosureClassMaps<ir.Node> {
   const KernelClosureClassMaps();
 
-  @override
-  ClosureClassMap getLocalFunctionMap(Local localFunction) {
-    return new ClosureClassMap(null, null, null, null);
-  }
-
-  @override
-  ClosureClassMap getMemberMap(MemberEntity member) {
-    ThisLocal thisLocal;
-    if (member.isInstanceMember) {
-      thisLocal = new ThisLocal(member);
-    }
-    return new ClosureClassMap(null, null, null, thisLocal);
-  }
-
   @override
   ClosureAnalysisInfo getClosureAnalysisInfo(ir.Node node) {
     return const ClosureAnalysisInfo();
@@ -337,6 +323,18 @@ class KernelClosureClassMaps implements ClosureClassMaps<ir.Node> {
       ir.Node loopNode) {
     return const LoopClosureRepresentationInfo();
   }
+
+  @override
+  ClosureRepresentationInfo getClosureRepresentationInfo(Entity entity) {
+    if (entity is MemberEntity) {
+      ThisLocal thisLocal;
+      if (entity.isInstanceMember) {
+        thisLocal = new ThisLocal(entity);
+      }
+      return new ClosureClassMap(null, null, null, thisLocal);
+    }
+    return const ClosureRepresentationInfo();
+  }
 }
 
 class KernelSorter implements Sorter {