Revert two Kernel changes that were causing test failures.

tests/language/assertion_initializer_test.dart

Index: tests/language/assertion_initializer_test.dart
diff --git a/tests/language_2/assertion_initializer_test.dart b/tests/language/assertion_initializer_test.dart
similarity index 97%
rename from tests/language_2/assertion_initializer_test.dart
rename to tests/language/assertion_initializer_test.dart
index 1eec4b1a365f2e8b21dd3792076ffa0cf6ec4c12..45369802b96bc1545aad154329cfb6076e259fdf 100644
--- a/tests/language_2/assertion_initializer_test.dart
+++ b/tests/language/assertion_initializer_test.dart
@@ -85,10 +85,10 @@ main() {
 }
 
 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); };