Use new try-catch syntax in runtime/, tools/, and utils/.

utils/pub/version.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.
 
 /**
  * Handles version numbers, following the [Semantic Versioning][semver] spec.
  *
  * [semver]: http://semver.org/
  */
 #library('version');
@@ skipping 51 matching lines @@
 
     try {
       int major = parseInt(match[1]);
       int minor = parseInt(match[2]);
       int patch = parseInt(match[3]);
 
       String preRelease = match[5];
       String build = match[8];
 
       return new Version(major, minor, patch, preRelease, build);
-    } catch (FormatException ex) {
+    } on FormatException catch (ex) {
       throw new FormatException('Could not parse "$text".');
     }
   }
 
   bool operator ==(other) {
     if (other is! Version) return false;
     return compareTo(other) == 0;
   }
 
   bool operator <(Version other) => compareTo(other) < 0;
@@ skipping 93 matching lines @@
   }
 
   /**
    * Splits a string of dot-delimited identifiers into their component parts.
    * Identifiers that are numeric are converted to numbers.
    */
   List _splitParts(String text) {
     return text.split('.').map((part) {
       try {
         return parseInt(part);
-      } catch (FormatException ex) {
+      } on FormatException catch (ex) {
         // Not a number.
         return part;
       }
     });
   }
 }
 
 /**
  * A [VersionConstraint] is a predicate that can determine whether a given
  * version is valid or not. For example, a ">= 2.0.0" constraint allows any
@@ skipping 223 matching lines @@
         case '<': return new VersionRange(max: version, includeMax: false);
         case '>=': return new VersionRange(min: version, includeMin: true);
         case '>': return new VersionRange(min: version, includeMin: false);
       }
     }
 
     // Otherwise, it must be an explicit version.
     return new Version.parse(text);
   }
 }