Add primitive to create closures and use it for closure conversion

pkg/kernel/lib/binary/ast_from_binary.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_from_binary;
 
 import 'dart:convert';
 import 'dart:typed_data';
 
 import '../ast.dart';
 import '../transformations/flags.dart';
@@ skipping 810 matching lines @@
         var index = readUInt();
         return new VectorGet(vectorExpression, index);
       case Tag.VectorSet:
         var vectorExpression = readExpression();
         var index = readUInt();
         var value = readExpression();
         return new VectorSet(vectorExpression, index, value);
       case Tag.VectorCopy:
         var vectorExpression = readExpression();
         return new VectorCopy(vectorExpression);
+      case Tag.ClosureCreation:
+        var topLevelFunctionName = readStringReference();
+        var contextVector = readExpression();
+        var functionType = readDartType();
+        return new ClosureCreation(
+            topLevelFunctionName, contextVector, functionType);
       default:
         throw fail('Invalid expression tag: $tag');
     }
   }
 
   List<MapEntry> readMapEntryList() {
     return new List<MapEntry>.generate(readUInt(), (i) => readMapEntry());
   }
 
   MapEntry readMapEntry() {
@@ skipping 278 matching lines @@
       ..fileOffset = offset
       ..fileEqualsOffset = fileEqualsOffset;
   }
 
   int readOffset() {
     // Offset is saved as unsigned,
     // but actually ranges from -1 and up (thus the -1)
     return readUInt() - 1;
   }
 }