Compute correct parent and fileUri for top-level fields.

pkg/front_end/lib/src/fasta/kernel/body_builder.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 fasta.body_builder;
 
 import 'package:front_end/src/fasta/parser/parser.dart' show
     FormalParameterType,
     optional;
 
@@ skipping 899 matching lines @@
     VariableDeclaration variable;
     if (node is VariableDeclaration) {
       variable = node;
     } else if (node is Identifier) {
       variable = new VariableDeclaration(node.name);
     } else {
       internalError("unhandled identifier: ${node.runtimeType}");
     }
     push(variable);
     scope[variable.name] = new KernelVariableBuilder(variable,
-        // TODO(ahe): This should be `member ?? classBuilder ?? part`, but we
-        // don't have an object representing the current part.
-        member ?? classBuilder);
+        member ?? classBuilder ?? library, uri);
   }
 
   @override
   void endVariablesDeclaration(int count, Token endToken) {
     debugEvent("VariablesDeclaration");
     List<VariableDeclaration> variables = popList(count);
     DartType type = pop();
     int modifiers = Modifier.validate(pop());
     bool isConst = (modifiers & constMask) != 0;
     bool isFinal = (modifiers & finalMask) != 0;
@@ skipping 821 matching lines @@
 
   @override
   void endFunctionName(Token token) {
     debugEvent("FunctionName");
     Identifier name = pop();
     VariableDeclaration variable = new VariableDeclaration(
         name.name, isFinal: true);
     push(new FunctionDeclaration(variable,
             new FunctionNode(new InvalidStatement())));
     scope[variable.name] = new KernelVariableBuilder(variable,
-        // TODO(ahe): This should be `member ?? classBuilder ?? part`, but we
-        // don't have an object representing the current part.
-        member ?? classBuilder);
+        member ?? classBuilder ?? library, uri);
     enterLocalScope();
   }
 
   @override
   void beginFunction(Token token) {
     debugEvent("beginFunction");
     functionNestingLevel++;
   }
 
   @override
@@ skipping 878 matching lines @@
     }
     return new FunctionType(positionalParameters, returnType,
         namedParameters: namedParameters,
         requiredParameterCount: requiredParameterCount);
   }
 
   Scope computeFormalParameterScope(Scope parent, Builder builder) {
     if (required.length == 0 && optional == null) return parent;
     Map<String, Builder> local = <String, Builder>{};
     for (VariableDeclaration parameter in required) {
-      local[parameter.name] = new KernelVariableBuilder(parameter, builder);
+      local[parameter.name] =
+          new KernelVariableBuilder(parameter, builder, builder.fileUri);
     }
     if (optional != null) {
       for (VariableDeclaration parameter in optional.formals) {
-        local[parameter.name] = new KernelVariableBuilder(parameter, builder);
+        local[parameter.name] =
+            new KernelVariableBuilder(parameter, builder, builder.fileUri);
       }
     }
     return new Scope(local, parent, isModifiable: false);
   }
 }
 
 /// Returns a block like this:
 ///
 ///     {
 ///       statement;
@@ skipping 24 matching lines @@
   } else if (node is TypeDeclarationBuilder) {
     return node.name;
   } else if (node is PrefixBuilder) {
     return node.name;
   } else if (node is ThisPropertyAccessor) {
     return node.name.name;
   } else {
     return internalError("Unhandled: ${node.runtimeType}");
   }
 }