Don't call dinvoke on Object methods

lib/src/utils.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.
 
 /// Holds a couple utility functions used at various places in the system.
 library dev_compiler.src.utils;
 
 import 'dart:io';
 
 import 'package:path/path.dart' as path;
 import 'package:analyzer/src/generated/ast.dart'
     show
         ImportDirective,
         ExportDirective,
         PartDirective,
         CompilationUnit,
         Identifier,
         AnnotatedNode,
-        AstNode;
+        AstNode,
+        Expression,
+        SimpleIdentifier;
 import 'package:analyzer/src/generated/engine.dart'
     show ParseDartTask, AnalysisContext;
 import 'package:analyzer/src/generated/source.dart' show Source;
 import 'package:analyzer/src/generated/element.dart';
 import 'package:analyzer/analyzer.dart' show parseDirectives;
 import 'package:crypto/crypto.dart' show CryptoUtils, MD5;
 import 'package:source_span/source_span.dart';
 import 'package:yaml/yaml.dart';
 
 import 'codegen/js_names.dart' show invalidJSVariableName;
@@ skipping 164 matching lines @@
     } catch (e) {
       // TODO(sigmund): remove this try-catch block (see issue #48).
     }
     if (baseMethod == null || baseMethod.isStatic) return null;
     return baseMethod.type;
   }
   ;
   return f;
 }
 
+bool isDynamicTarget(Expression target) {
+  return target != null &&
+      !(target is SimpleIdentifier && target.staticElement is PrefixElement) &&
+      target.staticType.isDynamic;
+}
+
 /// Returns an ANSII color escape sequence corresponding to [levelName]. Colors
 /// are defined for: severe, error, warning, or info. Returns null if the level
 /// name is not recognized.
 String colorOf(String levelName) {
   levelName = levelName.toLowerCase();
   if (levelName == 'shout' || levelName == 'severe' || levelName == 'error') {
     return _RED_COLOR;
   }
   if (levelName == 'warning') return _MAGENTA_COLOR;
   if (levelName == 'info') return _CYAN_COLOR;
@@ skipping 115 matching lines @@
   // TODO(jmesserly): can we implement this without repeatedly reading pubspec?
   // It seems like we should know our package's root directory without needing
   // to search like this.
   var pubspec =
       loadYaml(new File(path.join(dir, 'pubspec.yaml')).readAsStringSync());
 
   // Ensure this is loaded from the dev_compiler package.
   if (pubspec['name'] != 'dev_compiler') return null;
   return path.join('dev_compiler', 'runtime', filename);
 }