Compute KernelClosureRepresentationInfo.variableIsUsedInTryOrSync

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 2779c7699d64240405fa3f461218ff0a28c8a0f1..ac92e29336c872dccb1f05b28ff394791c75d32d 100644
--- a/pkg/compiler/lib/src/kernel/kernel_backend_strategy.dart
+++ b/pkg/compiler/lib/src/kernel/kernel_backend_strategy.dart
@@ -33,6 +33,7 @@ import '../universe/selector.dart';
 import '../universe/world_builder.dart';
 import '../universe/world_impact.dart';
 import '../world.dart';
+import 'closure.dart';
 import 'element_map_impl.dart';
 import 'kernel_strategy.dart';
 
@@ -143,6 +144,7 @@ class KernelSsaBuilder implements SsaBuilder {
 
   @override
   HGraph build(CodegenWorkItem work, ClosedWorld closedWorld) {
+    KernelToLocalsMap localsMap = new KernelToLocalsMapImpl(work.element);
     KernelSsaGraphBuilder builder = new KernelSsaGraphBuilder(
         work.element,
         work.element.enclosingClass,
@@ -150,11 +152,11 @@ class KernelSsaBuilder implements SsaBuilder {
         _compiler,
         _elementMap,
         new KernelToTypeInferenceMapImpl(closedWorld),
-        new KernelToLocalsMapImpl(work.element),
+        localsMap,
         closedWorld,
         _compiler.codegenWorldBuilder,
         work.registry,
-        _compiler.closureDataLookup,
+        new KernelClosureDataLookup(_elementMap, localsMap),
         // TODO(johnniwinther): Support these:
         const SourceInformationBuilder(),
         null, // Function node used as capture scope id.
@@ -285,7 +287,7 @@ class KernelToLocalsMapImpl implements KernelToLocalsMap {
   @override
   LoopClosureRepresentationInfo getClosureRepresentationInfoForLoop(
       ClosureDataLookup closureLookup, ir.TreeNode node) {
-    return const LoopClosureRepresentationInfo();
+    return closureLookup.getClosureRepresentationInfoForLoop(node);
   }
 }