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

lib/compiler/implementation/compile_time_constants.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.
 
 class Constant implements Hashable {
   const Constant();
 
   bool isNull() => false;
   bool isBool() => false;
   bool isTrue() => false;
@@ skipping 594 matching lines @@
   }
 
   /** Attempts to compile a constant expression. Returns null if not possible */
   Constant tryCompileNodeWithDefinitions(Node node, TreeElements definitions) {
     return measure(() {
       assert(node !== null);
       try {
         TryCompileTimeConstantEvaluator evaluator =
             new TryCompileTimeConstantEvaluator(definitions, compiler);
         return evaluator.evaluate(node);
-      } catch (CompileTimeConstantError exn) {
+      } on CompileTimeConstantError catch (exn) {
         return null;
       }
     });
   }
 
   /**
    * Returns a [List] of static non final fields that need to be initialized.
    * The list must be evaluated in order since the fields might depend on each
    * other.
    */
@@ skipping 584 matching lines @@
       Constant fieldValue = fieldValues[field];
       if (fieldValue === null) {
         // Use the default value.
         fieldValue = compiler.compileVariable(field);
       }
       jsNewArguments.add(fieldValue);
     });
     return jsNewArguments;
   }
 }