Reland "Merge more Kernel infrastructure from kernel_sdk SDK fork."

tests/kernel/unsorted/breakable_statement_test.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 'expect.dart';
+
+testFor() {
+  int current;
+  for (int i = 0; i < 100; i++) {
+    current = i;
+    if (i > 41) break;
+  }
+  Expect.isTrue(current == 42);
+}
+
+testWhile() {
+  int i = 0;
+  while (i < 100) {
+    if (++i > 41) break;
+  }
+  Expect.isTrue(i == 42);
+}
+
+testDoWhile() {
+  int i = 0;
+  do {
+    if (++i > 41) break;
+  } while (i < 100);
+  Expect.isTrue(i == 42);
+}
+
+testLabledBreakOutermost() {
+  int i = 0;
+  outer: {
+    middle: {
+      while (i < 100) {
+        if (++i > 41) break outer;
+      }
+      i++;
+    }
+    i++;
+  }
+  Expect.isTrue(i == 42);
+}
+
+testLabledBreakMiddle() {
+  int i = 0;
+  outer: {
+    middle: {
+      while (i < 100) {
+        if (++i > 41) break middle;
+      }
+      i++;
+    }
+    i++;
+  }
+  Expect.isTrue(i == 43);
+}
+
+testLabledBreakInner() {
+  int i = 0;
+  outer: {
+    middle: {
+      while (i < 100) {
+        if (++i > 41) break;
+      }
+      i++;
+    }
+    i++;
+  }
+  Expect.isTrue(i == 44);
+}
+
+main() {
+  testFor();
+  testWhile();
+  testDoWhile();
+  testLabledBreakOutermost();
+  testLabledBreakMiddle();
+  testLabledBreakInner();
+}