Revert "Temporarily disable CheckCastDebugTestRunner."

This reverts commit d4432631cf086c76fc6c86261f14a2f3ec66cb14.

Reason for revert: not reproducible.

Change-Id: Ia43dca5b0348d747d23292d79faf7bc44b43dfc5
diff --git a/src/test/java/com/android/tools/r8/ir/optimize/checkcast/CheckCastDebugTestRunner.java b/src/test/java/com/android/tools/r8/ir/optimize/checkcast/CheckCastDebugTestRunner.java
index d7a5732..1eddbd3 100644
--- a/src/test/java/com/android/tools/r8/ir/optimize/checkcast/CheckCastDebugTestRunner.java
+++ b/src/test/java/com/android/tools/r8/ir/optimize/checkcast/CheckCastDebugTestRunner.java
@@ -29,7 +29,6 @@
 import java.util.Arrays;
 import java.util.Collection;
 import org.junit.Before;
-import org.junit.Ignore;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.junit.runners.Parameterized;
@@ -77,7 +76,6 @@
     assertThat(classSubject, isPresent());
   }
 
-  @Ignore("todo: jsjeon")
   @Test
   public void test_differentLocals() throws Throwable {
     ClassSubject classSubject = inspector.clazz(MAIN);
@@ -131,7 +129,6 @@
     );
   }
 
-  @Ignore("todo: jsjeon")
   @Test
   public void test_sameLocal() throws Throwable {
     ClassSubject classSubject = inspector.clazz(MAIN);