Convert closures in all initializers, and share the context between them.

pkg/kernel/testcases/closures_initializers/initializers.dart

Index: pkg/kernel/testcases/closures_initializers/initializers.dart
diff --git a/pkg/kernel/testcases/closures_initializers/initializers.dart b/pkg/kernel/testcases/closures_initializers/initializers.dart
index 82d9285e83d55774271d01ff47a3821ae94fd7e1..60a3508eba1cae4ef147ae1fa65f3dc2c3666f93 100644
--- a/pkg/kernel/testcases/closures_initializers/initializers.dart
+++ b/pkg/kernel/testcases/closures_initializers/initializers.dart
@@ -19,8 +19,21 @@ class A {
   A(X i) : foo = ((() => i)());
 }
 
+// Closure in super initializer.
+//
+class S extends A {
+  S(X i) : super((() => i)());
+}
+
 // Closure in local initializer.
 //
+class S2 {
+  X foo_li;
+  S2(X foo) : foo_li = (() => foo)();
+}
+
+// Closure in redirecting initializer.
+//
 class B {
   X foo;
   B.named(X foo) {}
@@ -32,4 +45,8 @@ main() {
   a.foo; // To prevent dartanalyzer from marking [a] as unused.
   B b = new B(new X());
   b.foo;
+  S s = new S(new X());
+  s.foo;
+  S2 s2 = new S2(new X());
+  s2.foo_li;
 }