Fix for bug when binding non-symbolized members on native classes

pkg/dev_compiler/lib/src/compiler/compiler.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.
 
 import 'dart:collection' show HashSet, Queue;
 import 'dart:convert' show BASE64, JSON, UTF8;
 import 'dart:io' show File;
 
 import 'package:analyzer/analyzer.dart'
     show AnalysisError, CompilationUnit, ErrorSeverity;
@@ skipping 14 matching lines @@
 import 'package:analyzer/src/summary/package_bundle_reader.dart'
     show InSummarySource, InputPackagesResultProvider, SummaryDataStore;
 import 'package:args/args.dart' show ArgParser, ArgResults;
 import 'package:args/src/usage_exception.dart' show UsageException;
 import 'package:func/func.dart' show Func1;
 import 'package:path/path.dart' as path;
 import 'package:source_maps/source_maps.dart';
 
 import '../analyzer/context.dart' show AnalyzerOptions, createSourceFactory;
 import '../js_ast/js_ast.dart' as JS;
+import '../js_ast/js_ast.dart' show js;
 import 'code_generator.dart' show CodeGenerator;
 import 'error_helpers.dart' show errorSeverity, formatError, sortErrors;
 import 'extension_types.dart' show ExtensionTypeSet;
 import 'js_names.dart' as JS;
 import 'module_builder.dart' show transformModuleFormat, ModuleFormat;
 import 'source_map_printer.dart' show SourceMapPrintingContext;
 
 /// Compiles a set of Dart files into a single JavaScript module.
 ///
 /// For a single [BuildUnit] definition, this will produce a [JSModuleFile].
@@ skipping 457 matching lines @@
                 path.relative(path.fromUri(mapUrl), from: path.dirname(jsUrl)))
             .toString();
         assert(path.dirname(jsUrl) == path.dirname(mapUrl));
         printer.emit('\n//# sourceMappingURL=');
         printer.emit(relativeMapUrl);
         printer.emit('\n');
       }
     }
 
     var text = printer.getText();
-    var rawSourceMap = options.inlineSourceMap ? builtMap : null;
-    text = text.replaceFirst(sourceMapHoleID, JSON.encode(rawSourceMap));
+    var rawSourceMap = options.inlineSourceMap
+        ? js.escapedString(JSON.encode(builtMap)).value
+        : 'null';
+    text = text.replaceFirst(sourceMapHoleID, rawSourceMap);
 
     return new JSModuleCode(text, builtMap);
   }
 
   /// Similar to [getCode] but immediately writes the resulting files.
   ///
   /// If [mapPath] is not supplied but [options.sourceMap] is set, mapPath
   /// will default to [jsPath].map.
   void writeCodeSync(ModuleFormat format, String jsPath,
       {bool singleOutFile: false}) {
@@ skipping 75 matching lines @@
 /// are implementation details that would just confuse users.
 /// Normalize sdk urls to use "dart:" for more understandable stack traces.
 Map cleanupSdkSourcemap(Map sourceMap) {
   var map = new Map.from(sourceMap);
   var list = new List.from(map['sources']);
   map['sources'] = map['sources']
       .map((url) => url.contains('/_internal/') ? null : url)
       .toList();
   return map;
 }