dart2js cps: Overhaul PullIntoInitializers.

tests/compiler/dart2js/js_backend_cps_ir_closures_test.dart

Index: tests/compiler/dart2js/js_backend_cps_ir_closures_test.dart
diff --git a/tests/compiler/dart2js/js_backend_cps_ir_closures_test.dart b/tests/compiler/dart2js/js_backend_cps_ir_closures_test.dart
index d68f50aba36319c803506d54ab1410464dd5b02b..80425e6cc02f641f0137d3c5b4f074b13a72ead6 100644
--- a/tests/compiler/dart2js/js_backend_cps_ir_closures_test.dart
+++ b/tests/compiler/dart2js/js_backend_cps_ir_closures_test.dart
@@ -20,9 +20,8 @@ main(x) {
 """,
 r"""
 function(x) {
-  var _box_0 = {}, a;
+  var _box_0 = {}, a = new V.main_a(_box_0);
   _box_0._captured_x_0 = x;
-  a = new V.main_a(_box_0);
   _box_0._captured_x_0 = J.getInterceptor$ns(x = _box_0._captured_x_0).$add(x, "1");
   P.print(a.call$0());
   return null;
@@ -52,9 +51,8 @@ main() {
 """,
 r"""
 function() {
-  var _box_0 = {}, a;
+  var _box_0 = {}, a = new V.main_closure(_box_0);
   _box_0._captured_x_0 = 122;
-  a = new V.main_closure(_box_0);
   _box_0._captured_x_0 = _box_0._captured_x_0 + 1;
   P.print(a.call$0());
   return null;
@@ -73,9 +71,8 @@ main() {
 """,
 r"""
 function() {
-  var _box_0 = {}, a;
+  var _box_0 = {}, a = new V.main_closure(_box_0);
   _box_0._captured_x_0 = 122;
-  a = new V.main_closure(_box_0);
   _box_0._captured_x_0 = _box_0._captured_x_0 + 1;
   P.print(a.call$0().call$0());
   return null;