Support simple try in analyzer2dart.

pkg/analyzer2dart/test/sexpr_data.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.
 
 /// Test data for sexpr_test.
 library test.sexpr.data;
 
 import 'test_helper.dart';
 
 class TestSpec extends TestSpecBase {
@@ skipping 1487 matching lines @@
           (InvokeContinuation return (v1))))
         (InvokeMethod v0 foo () k1))))
     (InvokeConstructor C () k0)))
 ''',
 'C.foo': '''
 (FunctionDefinition foo () return
   (LetPrim (v0 (Constant (Null)))
     (InvokeContinuation return (v0))))
 '''}),
   ]),
+
+
+  const Group('Try-catch', const <TestSpec>[
+    const TestSpec('''
+main() {
+  try {} catch (e) {}
+}
+''',
+'''
+(FunctionDefinition main () return
+  (LetCont ((k0 ()
+      (LetPrim (v0 (Constant (Null)))
+        (InvokeContinuation return (v0)))))
+    (LetHandler ((v1 v2)
+        (InvokeContinuation k0 ()))
+      (InvokeContinuation k0 ()))))
+'''),
+
+    const TestSpec('''
+main() {
+  try {
+    return;
+  } catch (e) {}
+}
+''',
+'''
+(FunctionDefinition main () return
+  (LetCont ((k0 ()
+      (LetPrim (v0 (Constant (Null)))
+        (InvokeContinuation return (v0)))))
+    (LetHandler ((v1 v2)
+        (InvokeContinuation k0 ()))
+      (LetPrim (v3 (Constant (Null)))
+        (InvokeContinuation return (v3))))))
+'''),
+  ]),
 ];