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

lib/dom/templates/html/dart2js/impl_Window.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.
 
 class $CLASSNAME$EXTENDS$IMPLEMENTS native "@*DOMWindow" {
 
   _DocumentImpl get document() native "return this.document;";
 
   Window get _top() native "return this.top;";
 
@@ skipping 51 matching lines @@
   void set _location(Location value) native 'this.location = value';
   // Prevent compiled from thinking 'location' property is available for a Dart
   // member.
   _protect_location() native 'location';
 
   static _isDartLocation(thing) {
     // On Firefox the code that implements 'is Location' fails to find the patch
     // stub on Object.prototype and throws an exception.
     try {
       return thing is Location;
-    } catch (var e) {
+    } catch (e) {
       return false;
     }
   }
 
 
   void requestLayoutFrame(TimeoutHandler callback) {
     _addMeasurementFrameCallback(callback);
   }
 
   /** @domName DOMWindow.requestAnimationFrame */
@@ skipping 41 matching lines @@
     return _deserialize(port);
   }
 
   registerPort(String name, var port) {
     var serialized = _serialize(port);
     localStorage['dart-port:$name'] = JSON.stringify(serialized);
   }
 
 $!MEMBERS
 }