Roll Observatory packages and add a roll script

packages/analyzer/lib/src/generated/sdk.dart

 // Copyright (c) 2014, 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.
 
-// 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.sdk;
 
 import 'dart:collection';
 
 import 'ast.dart';
 import 'engine.dart' show AnalysisContext;
 import 'source.dart' show ContentCache, Source, UriKind;
 
 /**
  * A Dart SDK installed in a specified location.
@@ skipping 278 matching lines @@
   /**
    * The bit mask used to access the bit representing the flag indicating
    * whether a library is intended to work on the VM platform.
    */
   static int VM_PLATFORM = 2;
 
   /**
    * The short name of the library. This is the name used after 'dart:' in a
    * URI.
    */
-  String _shortName = null;
+  final String shortName;
 
   /**
    * The path to the file defining the library. The path is relative to the
    * 'lib' directory within the SDK.
    */
   String path = null;
 
   /**
    * The name of the category containing the library. Unless otherwise specified
    * in the libraries file all libraries are assumed to be shared between server
@@ skipping 13 matching lines @@
 
   /**
    * An encoding of which platforms this library is intended to work on.
    */
   int _platforms = 0;
 
   /**
    * Initialize a newly created library to represent the library with the given
    * [name].
    */
-  SdkLibraryImpl(String name) {
-    this._shortName = name;
-  }
+  SdkLibraryImpl(this.shortName);
 
   /**
    * Set whether the library is documented.
    */
   void set documented(bool documented) {
     this._documented = documented;
   }
 
   /**
    * Set whether the library is an implementation library.
@@ skipping 13 matching lines @@
 
   @override
   bool get isInternal => "Internal" == category;
 
   @override
   bool get isShared => category == "Shared";
 
   @override
   bool get isVmLibrary => (_platforms & VM_PLATFORM) != 0;
 
-  @override
-  String get shortName => _shortName;
-
   /**
    * Record that this library can be compiled to JavaScript by dart2js.
    */
   void setDart2JsLibrary() {
     _platforms |= DART2JS_PLATFORM;
   }
 
   /**
    * Record that this library can be run on the VM.
    */
   void setVmLibrary() {
     _platforms |= VM_PLATFORM;
   }
 }