Update pub to new getter syntax.

utils/pub/version_solver.dart

 // Copyright (c) 2012, 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.
 
 /**
  * Attempts to resolve a set of version constraints for a package dependency
  * graph and select an appropriate set of best specific versions for all
  * dependent packages. It works iteratively and tries to reach a stable
  * solution where the constraints of all dependencies are met. If it fails to
  * reach a solution after a certain number of iterations, it assumes the
@@ skipping 235 matching lines @@
   final description;
 
   /**
    * The new selected version.
    */
   final Version version;
 
   /**
    * The name of the package whose version is changing.
    */
-  String get package() => source.packageName(description);
+  String get package => source.packageName(description);
 
   ChangeVersion(this.source, this.description, this.version) {
     if (source == null) throw "null source";
   }
 
   Future process(VersionSolver solver) {
     var dependency = solver.getDependency(package);
     var oldVersion = dependency.version;
     solver.setVersion(package, version);
 
@@ skipping 279 matching lines @@
   /**
    * Whether this dependency should always select the latest version.
    */
   bool useLatestVersion = false;
 
   /**
    * Gets whether or not any other packages are currently depending on this
    * one. If `false`, then it means this package is not part of the dependency
    * graph and should be omitted.
    */
-  bool get isDependedOn() => !_refs.isEmpty();
+  bool get isDependedOn => !_refs.isEmpty();
 
   /** The names of all the packages that depend on this dependency. */
-  Collection<String> get dependers() => _refs.getKeys();
+  Collection<String> get dependers => _refs.getKeys();
 
   /**
    * Gets the overall constraint that all packages are placing on this one.
    * If no packages have a constraint on this one (which can happen when this
    * package is in the process of being added to the graph), returns `null`.
    */
-  VersionConstraint get constraint() {
+  VersionConstraint get constraint {
     if (_refs.isEmpty()) return null;
     return new VersionConstraint.intersect(
         _refs.getValues().map((ref) => ref.constraint));
   }
 
   Dependency(this.name)
       : _refs = <String, PackageRef>{};
 
   Dependency._clone(Dependency other)
       : name = other.name,
@@ skipping 123 matching lines @@
   final description1;
   final description2;
 
   DescriptionMismatchException(this.package, this.description1,
       this.description2);
 
   // TODO(nweiz): Dump to YAML when that's supported
   String toString() => "Package '$package' has conflicting descriptions "
     "'${JSON.stringify(description1)}' and '${JSON.stringify(description2)}'";
 }