Support simple try in analyzer2dart.

pkg/analyzer2dart/lib/src/cps_generator.dart

 // Copyright (c) 2014, 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.
 
 library analyzer2dart.cps_generator;
 
 import 'package:analyzer/analyzer.dart';
 
 import 'package:compiler/src/dart_types.dart' as dart2js;
 import 'package:compiler/src/elements/elements.dart' as dart2js;
@@ skipping 554 matching lines @@
         isNotCheck: node.notOperator != null);
   }
 
   @override
   ir.Primitive visitAsExpression(AsExpression node) {
     return irBuilder.buildTypeOperator(
         visit(node.expression),
         converter.convertType(node.type.type),
         isTypeTest: false);
   }
+
+  @override
+  visitTryStatement(TryStatement node) {
+    List<CatchClauseInfo> catchClauseInfos = <CatchClauseInfo>[];
+    for (CatchClause catchClause in node.catchClauses) {
+      catchClauseInfos.add(new CatchClauseInfo(
+          exceptionVariable: converter.convertElement(
+              catchClause.exceptionParameter.staticElement),
+          buildCatchBlock: subbuild(catchClause.body)));
+
+    }
+    irBuilder.buildTry(
+        tryStatementInfo: new TryStatementInfo(),
+        buildTryBlock: subbuild(node.body),
+        catchClauseInfos: catchClauseInfos);
+  }
 }
 
 class NullCapturedVariables extends DartCapturedVariables {
   NullCapturedVariables() : super(null);
 }