Simplify constructors translation, improve code style.

pkg/analyzer_experimental/lib/src/generated/instrumentation.dart

 // This code was auto-generated, is not intended to be edited, and is subject to
 // significant change. Please see the README file for more information.
 library engine.instrumentation;
 import 'java_core.dart';
 /**
  * The class `Instrumentation` implements support for logging instrumentation information.
  *
  * Instrumentation information consists of information about specific operations. Those operations
  * can range from user-facing operations, such as saving the changes to a file, to internal
  * operations, such as tokenizing source code. The information to be logged is gathered by
@@ skipping 255 matching lines @@
       return InstrumentationLevel.EVERYTHING;
     }
     if (str == "METRICS") {
       return InstrumentationLevel.METRICS;
     }
     if (str == "OFF") {
       return InstrumentationLevel.OFF;
     }
     throw new IllegalArgumentException("Unrecognised InstrumentationLevel");
   }
-  InstrumentationLevel(this.name, this.ordinal) {
-  }
+  InstrumentationLevel(this.name, this.ordinal);
   int compareTo(InstrumentationLevel other) => ordinal - other.ordinal;
   int get hashCode => ordinal;
   String toString() => name;
 }
 /**
  * The interface `InstrumentationLogger` defines the behavior of objects that are used to log
  * instrumentation data.
  *
  * For an example of using objects that implement this interface, see [Instrumentation].
  *
  * @coverage dart.engine.utilities
  */
 abstract class InstrumentationLogger {
 
   /**
    * Create a builder that can collect the data associated with an operation identified by the given
    * name.
    *
    * @param name the name used to uniquely identify the operation
    * @return the builder that was created
    */
   InstrumentationBuilder createBuilder(String name);
 }