Remove debug output and copy java_io.dart into resources.

editor/util/plugins/com.google.dart.java2dart/resources/java_io.dart

 library java.io;
 
 import "dart:io";
 import 'java_core.dart' show JavaIOException;
 import 'package:path/path.dart' as pathos;
 
 class JavaSystemIO {
   static Map<String, String> _properties = new Map();
   static String getProperty(String name) {
     {
       String value = _properties[name];
       if (value != null) {
         return value;
       }
     }
     if (name == 'os.name') {
       return Platform.operatingSystem;
     }
     if (name == 'line.separator') {
       if (Platform.isWindows) {
         return '\r\n';
       }
       return '\n';
     }
     if (name == 'com.google.dart.sdk') {
-      String value = Platform.environment['DART_SDK'];
-      if (value != null) {
-        _properties[name] = value;
-        return value;
-      }
-    }
-    if (name == 'com.google.dart.sdk') {
       String exec = Platform.executable;
       if (exec.length != 0) {
         String sdkPath;
-        // may be "xcodebuild/ReleaseIA32/dart" with "dart-sdk" sibling
+        // may be "xcodebuild/ReleaseIA32/dart" with "sdk" sibling
         {
-          sdkPath = pathos.join(pathos.dirname(exec), "dart-sdk");
+          var outDir = pathos.dirname(pathos.dirname(exec));
+          sdkPath = pathos.join(pathos.dirname(outDir), "sdk");
           if (new Directory(sdkPath).existsSync()) {
             _properties[name] = sdkPath;
             return sdkPath;
           }
         }
         // probably be "dart-sdk/bin/dart"
         sdkPath = pathos.dirname(pathos.dirname(exec));
         _properties[name] = sdkPath;
         return sdkPath;
       }
@@ skipping 74 matching lines @@
     var files = <JavaFile>[];
     var entities = _newDirectory().listSync();
     for (FileSystemEntity entity in entities) {
       files.add(new JavaFile(entity.path));
     }
     return files;
   }
   File _newFile() => new File(_path);
   Directory _newDirectory() => new Directory(_path);
 }