Split getClosureRepresentationInfo into MemberEntity and (ir/ast) nodes

pkg/compiler/lib/src/ssa/builder_kernel.dart

Index: pkg/compiler/lib/src/ssa/builder_kernel.dart
diff --git a/pkg/compiler/lib/src/ssa/builder_kernel.dart b/pkg/compiler/lib/src/ssa/builder_kernel.dart
index 2da1e5811649290fd0459f5525fcb02b4d3595f5..5b2ffdcfeee3856ca139c759afdc649148926d2c 100644
--- a/pkg/compiler/lib/src/ssa/builder_kernel.dart
+++ b/pkg/compiler/lib/src/ssa/builder_kernel.dart
@@ -3067,9 +3067,8 @@ class KernelSsaGraphBuilder extends ir.Visitor
 
   @override
   visitFunctionNode(ir.FunctionNode node) {
-    Local methodElement = localsMap.getLocalFunction(node.parent);
     ClosureRepresentationInfo closureInfo =
-        closureDataLookup.getClosureRepresentationInfo(methodElement);
+        localsMap.getClosureRepresentationInfo(closureDataLookup, node.parent);
     ClassEntity closureClassEntity = closureInfo.closureClassEntity;
 
     List<HInstruction> capturedVariables = <HInstruction>[];
@@ -3088,8 +3087,8 @@ class KernelSsaGraphBuilder extends ir.Visitor
   visitFunctionDeclaration(ir.FunctionDeclaration declaration) {
     assert(isReachable);
     declaration.function.accept(this);
-    Local localFunction = localsMap.getLocalFunction(declaration);
-    localsHandler.updateLocal(localFunction, pop());
+    Local local = localsMap.getLocalVariable(declaration.variable);
+    localsHandler.updateLocal(local, pop());
   }
 
   @override