Add primitive to create closures and use it for closure conversion

pkg/kernel/lib/visitor.dart

 // Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 library kernel.ast.visitor;
 
 import 'ast.dart';
 
 abstract class ExpressionVisitor<R> {
   R defaultExpression(Expression node) => null;
   R defaultBasicLiteral(BasicLiteral node) => defaultExpression(node);
@@ skipping 40 matching lines @@
   R visitBoolLiteral(BoolLiteral node) => defaultBasicLiteral(node);
   R visitNullLiteral(NullLiteral node) => defaultBasicLiteral(node);
   R visitLet(Let node) => defaultExpression(node);
   R visitLoadLibrary(LoadLibrary node) => defaultExpression(node);
   R visitCheckLibraryIsLoaded(CheckLibraryIsLoaded node) =>
       defaultExpression(node);
   R visitVectorCreation(VectorCreation node) => defaultExpression(node);
   R visitVectorGet(VectorGet node) => defaultExpression(node);
   R visitVectorSet(VectorSet node) => defaultExpression(node);
   R visitVectorCopy(VectorCopy node) => defaultExpression(node);
+  R visitClosureCreation(ClosureCreation node) => defaultExpression(node);
 }
 
 abstract class StatementVisitor<R> {
   R defaultStatement(Statement node) => null;
 
   R visitInvalidStatement(InvalidStatement node) => defaultStatement(node);
   R visitExpressionStatement(ExpressionStatement node) =>
       defaultStatement(node);
   R visitBlock(Block node) => defaultStatement(node);
   R visitEmptyStatement(EmptyStatement node) => defaultStatement(node);
@@ skipping 91 matching lines @@
   R visitBoolLiteral(BoolLiteral node) => defaultBasicLiteral(node);
   R visitNullLiteral(NullLiteral node) => defaultBasicLiteral(node);
   R visitLet(Let node) => defaultExpression(node);
   R visitLoadLibrary(LoadLibrary node) => defaultExpression(node);
   R visitCheckLibraryIsLoaded(CheckLibraryIsLoaded node) =>
       defaultExpression(node);
   R visitVectorCreation(VectorCreation node) => defaultExpression(node);
   R visitVectorGet(VectorGet node) => defaultExpression(node);
   R visitVectorSet(VectorSet node) => defaultExpression(node);
   R visitVectorCopy(VectorCopy node) => defaultExpression(node);
+  R visitClosureCreation(ClosureCreation node) => defaultExpression(node);
 
   // Statements
   R defaultStatement(Statement node) => defaultTreeNode(node);
   R visitInvalidStatement(InvalidStatement node) => defaultStatement(node);
   R visitExpressionStatement(ExpressionStatement node) =>
       defaultStatement(node);
   R visitBlock(Block node) => defaultStatement(node);
   R visitEmptyStatement(EmptyStatement node) => defaultStatement(node);
   R visitAssertStatement(AssertStatement node) => defaultStatement(node);
   R visitLabeledStatement(LabeledStatement node) => defaultStatement(node);
@@ skipping 203 matching lines @@
   R visitNullLiteral(NullLiteral node, arg) => defaultBasicLiteral(node, arg);
   R visitLet(Let node, arg) => defaultExpression(node, arg);
   R visitLoadLibrary(LoadLibrary node, arg) => defaultExpression(node, arg);
   R visitCheckLibraryIsLoaded(CheckLibraryIsLoaded node, arg) =>
       defaultExpression(node, arg);
   R visitVectorCreation(VectorCreation node, arg) =>
       defaultExpression(node, arg);
   R visitVectorGet(VectorGet node, arg) => defaultExpression(node, arg);
   R visitVectorSet(VectorSet node, arg) => defaultExpression(node, arg);
   R visitVectorCopy(VectorCopy node, arg) => defaultExpression(node, arg);
+  R visitClosureCreation(ClosureCreation node, arg) =>
+      defaultExpression(node, arg);
 }
 
 abstract class StatementVisitor1<R> {
   R defaultStatement(Statement node, arg) => null;
 
   R visitInvalidStatement(InvalidStatement node, arg) =>
       defaultStatement(node, arg);
   R visitExpressionStatement(ExpressionStatement node, arg) =>
       defaultStatement(node, arg);
   R visitBlock(Block node, arg) => defaultStatement(node, arg);
@@ skipping 20 matching lines @@
       defaultStatement(node, arg);
   R visitTryCatch(TryCatch node, arg) => defaultStatement(node, arg);
   R visitTryFinally(TryFinally node, arg) => defaultStatement(node, arg);
   R visitYieldStatement(YieldStatement node, arg) =>
       defaultStatement(node, arg);
   R visitVariableDeclaration(VariableDeclaration node, arg) =>
       defaultStatement(node, arg);
   R visitFunctionDeclaration(FunctionDeclaration node, arg) =>
       defaultStatement(node, arg);
 }