Handle dart:html in kernel_impact

pkg/compiler/lib/src/ssa/kernel_impact.dart

 // Copyright (c) 2016, 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.
 
 import 'package:kernel/ast.dart' as ir;
 
 import '../common.dart';
 import '../common/names.dart';
 import '../compiler.dart';
 import '../constants/expressions.dart';
@@ skipping 514 matching lines @@
 
   @override
   void visitTryCatch(ir.TryCatch node) {
     visitNode(node.body);
     visitNodes(node.catches);
   }
 
   @override
   void visitCatch(ir.Catch node) {
     impactBuilder.registerFeature(Feature.CATCH_STATEMENT);
-    visitNode(node.exception);
     if (node.stackTrace != null) {
       impactBuilder.registerFeature(Feature.STACK_TRACE_IN_CATCH);
     }
     if (node.guard is! ir.DynamicType) {
       impactBuilder.registerTypeUse(
           new TypeUse.catchType(astAdapter.getDartType(node.guard)));
     }
     visitNode(node.body);
   }
 
@@ skipping 22 matching lines @@
     Element target = astAdapter.getElement(node.target).declaration;
     impactBuilder.registerStaticUse(new StaticUse.superConstructorInvoke(
         target, astAdapter.getCallStructure(node.arguments)));
   }
 
   // TODO(johnniwinther): Make this throw and visit child nodes explicitly
   // instead to ensure that we don't visit unwanted parts of the ir.
   @override
   void defaultNode(ir.Node node) => node.visitChildren(this);
 }