Add transformLibraries for closure conversion

pkg/kernel/lib/transformations/closure/info.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.transformations.closure.info;
 
 import '../../ast.dart'
     show
         Class,
         Constructor,
@@ skipping 46 matching lines @@
 
   FunctionNode currentMemberFunction;
 
   bool get isOuterMostContext {
     return currentFunction == null || currentMemberFunction == currentFunction;
   }
 
   /// Maps the names of all instance methods that may be torn off (aka
   /// implicitly closurized) to `${name.name}#get`.
   Map<Name, Name> get tearOffGetterNames {
-    Map<Name, Name> result = <Name, Name>{};
-    for (Name name in declaredInstanceMethodNames) {
-      if (invokedGetters.contains(name)) {
-        result[name] = new Name("${name.name}#get", name.library);
-      }
-    }
-    return result;
+    // TODO(dmitryas): Add support for tear-offs. When added, uncomment this.
+    //
+    // Map<Name, Name> result = <Name, Name>{};
+    // for (Name name in declaredInstanceMethodNames) {
+    //   if (invokedGetters.contains(name)) {
+    //     result[name] = new Name("${name.name}#get", name.library);
+    //   }
+    // }
+    // return result;
+    //
+    // Currently an empty map is returned, so no tear-offs supporting functions
+    // and getters are generated, and no property-get targets are renamed.
+    return <Name, Name>{};
   }
 
   void beginMember(Member member, [FunctionNode function]) {
     currentMemberLocalNames.clear();
     if (function != null) {
       localNames[function] = computeUniqueLocalName(member.name.name);
     }
     currentMember = member;
     currentMemberFunction = function;
   }
@@ skipping 113 matching lines @@
       thisAccess.putIfAbsent(
           currentMemberFunction, () => new VariableDeclaration("#self"));
     }
   }
 
   visitPropertyGet(PropertyGet node) {
     invokedGetters.add(node.name);
     super.visitPropertyGet(node);
   }
 }