dart2js-kernel: do not initialize static fields in constructor

pkg/compiler/lib/src/ssa/builder_kernel.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 '../closure.dart';
 import '../common.dart';
 import '../common/codegen.dart' show CodegenRegistry, CodegenWorkItem;
 import '../common/names.dart';
@@ skipping 272 matching lines @@
         hasRtiInput: false);
 
     add(create);
 
     // Generate calls to the constructor bodies.
 
     closeAndGotoExit(new HReturn(create, null));
     closeFunction();
   }
 
-  /// Maps the fields of a class to their SSA values.
+  /// Maps the instance fields of a class to their SSA values.
   Map<ir.Field, HInstruction> _collectFieldValues(ir.Class clazz) {
     final fieldValues = <ir.Field, HInstruction>{};
 
     for (var field in clazz.fields) {
-      if (field.initializer == null) {
-        fieldValues[field] = graph.addConstantNull(closedWorld);
-      } else {
-        // Gotta update the resolvedAst when we're looking at field values
-        // outside the constructor.
-        astAdapter.pushResolvedAst(field);
-        field.initializer.accept(this);
-        fieldValues[field] = pop();
-        astAdapter.popResolvedAstStack();
+      if (field.isInstanceMember) {
+        if (field.initializer == null) {
+          fieldValues[field] = graph.addConstantNull(closedWorld);
+        } else {
+          // Gotta update the resolvedAst when we're looking at field values
+          // outside the constructor.
+          astAdapter.pushResolvedAst(field);
+          field.initializer.accept(this);
+          fieldValues[field] = pop();
+          astAdapter.popResolvedAstStack();
+        }
       }
     }
 
     return fieldValues;
   }
 
   /// Collects field initializers all the way up the inheritance chain.
   void _buildInitializers(
       ir.Constructor constructor, Map<ir.Field, HInstruction> fieldValues) {
     var foundSuperOrRedirectCall = false;
@@ skipping 2167 matching lines @@
     kernelBuilder.open(exitBlock);
     enterBlock.setBlockFlow(
         new HTryBlockInformation(
             kernelBuilder.wrapStatementGraph(bodyGraph),
             exception,
             kernelBuilder.wrapStatementGraph(catchGraph),
             kernelBuilder.wrapStatementGraph(finallyGraph)),
         exitBlock);
   }
 }