Revert two Kernel changes that were causing test failures.

tests/language/assertion_initializer_test.dart

 // Copyright (c) 201, 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.
 // VMOptions=--assert_initializer
 //
 // Dart test program testing assert statements.
 
 import "package:expect/expect.dart";
 
 class C {
@@ skipping 67 matching lines @@
   Expect.identical(c1, const C.cc05(1, 2));
   Expect.identical(c1, const C.cc06(1, 2));
   Expect.identical(c1, const C.cc07(1, 2));
   Expect.identical(c1, const C.cc08(1, 2));
   Expect.identical(c1, const C.cc09(1, 2));
   Expect.identical(c1, const C.cc10(1, 2));
   Expect.identical(c1, const C.cc11(1, 2));
 }
 
 void test(int x, int y) {
-  bool assertionsEnabled = false;
-  assert(assertionsEnabled = true);
+  bool checkedMode = false;
+  assert(checkedMode = true);
 
-  bool Function(C Function()) doTest = (assertionsEnabled && x >= y)
+  bool Function(C Function()) doTest = (checkedMode && x >= y)
     ? (f) { Expect.throws(f, (e) => e is AssertionError); }
     : (f) { Expect.equals(x, f().x); };
 
   doTest(() => new C.c01(x, y));
   doTest(() => new C.c02(x, y));
   doTest(() => new C.c03(x, y));
   doTest(() => new C.c04(x, y));
   doTest(() => new C.c05(x, y));
   doTest(() => new C.c06(x, y));
   doTest(() => new C.c07(x, y));
@@ skipping 29 matching lines @@
   doTest(() => new C.fc04(x, y));
   doTest(() => new C.fc05(x, y));
   doTest(() => new C.fc06(x, y));
   doTest(() => new C.fc07(x, y));
   doTest(() => new C.fc08(x, y));
   doTest(() => new C.fc09(x, y));
   doTest(() => new C.fc10(x, y));
   doTest(() => new C.fc11(x, y));
 }