Update corelib/ and lib/ to use the new try-catch syntax.

lib/dom/templates/html/impl/impl_Node.darttemplate

 // 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.
 
 /**
  * Lazy implementation of the child nodes of an element that does not request
  * the actual child nodes of an element until strictly necessary greatly
  * improving performance for the typical cases where it is not required.
  */
 class _ChildNodeListLazy implements NodeList {
@@ skipping 118 matching lines @@
       final _NodeImpl parent = this.parent;
       parent.$dom_removeChild(this);
     }
     return this;
   }
 
   _NodeImpl replaceWith(Node otherNode) {
     try {
       final _NodeImpl parent = this.parent;
       parent.$dom_replaceChild(otherNode, this);
-    } catch(var e) {
-      
+    } catch (e) {
+
     };
     return this;
   }
 
 $!MEMBERS
 }