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

runtime/bin/http_parser.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.
 
 // Global constants.
 class _Const {
   // Bytes for "HTTP".
   static const HTTP = const [72, 84, 84, 80];
   // Bytes for "HTTP/1.".
   static const HTTP1DOT = const [72, 84, 84, 80, 47, 49, 46];
@@ skipping 529 matching lines @@
 
           default:
             // Should be unreachable.
             assert(false);
             break;
         }
 
         // Move to the next byte.
         index++;
       }
-    } catch (var e) {
+    } catch (e) {
       // Report the error through the error callback if any. Otherwise
       // throw the error.
       if (error != null) {
         error(e);
         _state = _State.FAILURE;
       } else {
         throw e;
       }
     }
 
@@ skipping 156 matching lines @@
   Function dataEnd;
   Function error;
 }
 
 
 class HttpParserException implements Exception {
   const HttpParserException([String this.message = ""]);
   String toString() => "HttpParserException: $message";
   final String message;
 }