Fix handling of inline JS types in DDC.

pkg/dev_compiler/lib/src/compiler/code_generator.dart

 // Copyright (c) 2015, 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.
 
 import 'dart:collection' show HashMap, HashSet;
 import 'dart:math' show min, max;
 
 import 'package:analyzer/analyzer.dart' hide ConstantEvaluator;
 import 'package:analyzer/dart/ast/ast.dart';
@@ skipping 574 matching lines @@
   @override
   visitCompilationUnit(CompilationUnit unit) {
     // NOTE: this method isn't the right place to initialize
     // per-compilation-unit state. Declarations can be visited out of order,
     // this is only to catch things that haven't been emitted yet.
     //
     // See _emitTypeDeclaration.
     var library = unit.element.library;
     bool internalSdk = isSdkInternalRuntime(library);
     _currentElements.add(library);
-
     List<VariableDeclaration> fields;
     for (var declaration in unit.declarations) {
       if (declaration is TopLevelVariableDeclaration) {
         inferNullableTypes(declaration);
         if (internalSdk && declaration.variables.isFinal) {
           _emitInternalSdkFields(declaration.variables.variables);
         } else {
           (fields ??= []).addAll(declaration.variables.variables);
         }
         continue;
@@ skipping 5223 matching lines @@
   if (targetIdentifier.staticElement is! PrefixElement) return false;
   var prefix = targetIdentifier.staticElement as PrefixElement;
 
   // The library the prefix is referring to must come from a deferred import.
   var containingLibrary = resolutionMap
       .elementDeclaredByCompilationUnit(target.root as CompilationUnit)
       .library;
   var imports = containingLibrary.getImportsWithPrefix(prefix);
   return imports.length == 1 && imports[0].isDeferred;
 }